

References
A list of the scholarly sources informing, and influencing, this formulation of this approach.
Foundations: Postbiological & Civilizational Trajectories
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Dick, S. J. (2003). Cultural evolution, the postbiological universe and SETI. International Journal of Astrobiology, 2(1), 65–74. https://doi.org/10.1017/S147355040300137X
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Dick, S. J. (2008). The postbiological universe. Acta Astronautica, 62(8–9), 499–504. https://doi.org/10.1016/j.actaastro.2008.01.025
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Ćirković, M. M. (2018). Post-postbiological evolution? Futures, 99, 28–35. https://doi.org/10.1016/j.futures.2018.03.010
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Dyson, F. J. (1979). Time without end: Physics and biology in an open universe. Reviews of Modern Physics, 51(3), 447–460. https://doi.org/10.1103/RevModPhys.51.447
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Smart, J. M. (2012). The transcension hypothesis: Sufficiently advanced civilizations invariably leave our universe, and implications for METI and SETI. Acta Astronautica, 78, 55–68. https://doi.org/10.1016/j.actaastro.2011.11.006
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Peters, T. (2018). Outer space and cyber space: Meeting ET in the cloud. International Journal of Astrobiology, 17(4), 282–286. https://doi.org/10.1017/S1473550416000318
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Frank, A., Grinspoon, D., & Walker, S. (2022). Intelligence as a planetary scale process. International Journal of Astrobiology, 21(2), 47–61. https://doi.org/10.1017/S147355042100029X
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Romanovskaya, I. K. (2023). Planetary biotechnospheres, biotechnosignatures and the search for extraterrestrial intelligence. International Journal of Astrobiology, 22(6), 663–695. https://doi.org/10.1017/S1473550423000204
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Shostak, S. (2010). What ET will look like and why should we care. Acta Astronautica, 67(9–10), 1025–1029. https://doi.org/10.1016/j.actaastro.2010.06.028
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Dysonian/Artifact SETI & Strategy
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Bradbury, R. J., Ćirković, M. M., & Dvorsky, G. (2011). Dysonian Approach to SETI: A Fruitful Middle Ground? Journal of the British Interplanetary Society, 64(5), 156–165.
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Benford, J. (2021). A Drake Equation for Alien Artifacts. Astrobiology, 21(6), 757–763. https://doi.org/10.1089/ast.2020.2364
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Armstrong, S., & Sandberg, A. (2013). Eternity in six hours: Intergalactic spreading of intelligent life and sharpening the Fermi paradox. Acta Astronautica, 89, 1–13. https://doi.org/10.1016/j.actaastro.2013.04.002
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Haqq-Misra, J. D., & Baum, S. D. (2009). The Sustainability Solution to the Fermi Paradox. Journal of the British Interplanetary Society, 62(2), 47–51.
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Von Neumann Replicators: Theory, Models, Engineering
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Freitas, R. A., Jr. (1980). A Self-Reproducing Interstellar Probe. Journal of the British Interplanetary Society, 33, 251–264.
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Tipler, F. J. (1980). Extraterrestrial intelligent beings do not exist. Quarterly Journal of the Royal Astronomical Society, 21, 267–281.
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Sagan, C., & Newman, W. I. (1983). The Solipsist Approach to Extraterrestrial Intelligence. Quarterly Journal of the Royal Astronomical Society, 24, 113–121.
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Ćirković, M. M., & Bradbury, R. J. (2006). Galactic gradients, postbiological evolution and the apparent failure of SETI. New Astronomy, 11(8), 628–639. https://doi.org/10.1016/j.newast.2006.04.003
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Borgue, O., & Hein, A. M. (2021). Near-term self-replicating probes — A concept design. Acta Astronautica, 187, 546–556. https://doi.org/10.1016/j.actaastro.2021.03.004
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Matloff, G. L. (2022). Von Neumann probes: Rationale, propulsion, interstellar transfer timing. International Journal of Astrobiology, 21(4), 205–211. https://doi.org/10.1017/S1473550422000027
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Ellery, A. (2022a). Curbing the fruitfulness of self-replicating machines. International Journal of Astrobiology, 21(4), 243–259. https://doi.org/10.1017/S1473550422000246
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Ellery, A. (2022b). Self-replicating probes are imminent — implications for SETI. International Journal of Astrobiology, 21(4), 212–242. https://doi.org/10.1017/S1473550422000234
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Chen, Y., Ni, J., & Ong, Y. C. (2022). Lotka–Volterra models for extraterrestrial self-replicating probes. The European Physical Journal Plus, 137(10), 1109. https://doi.org/10.1140/epjp/s13360-022-03320-3
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Smith, G. H. (2023). On the first probe to transit between two interstellar civilizations. International Journal of Astrobiology, 22(3), 185–196. https://doi.org/10.1017/S1473550422000428
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UAP: History, Sociology, and Institutional Context
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Hynek, J. A. (1972). The UFO Experience: A Scientific Inquiry. Henry Regnery Company.
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Bullard, T. E. (2010). The Myth and Mystery of UFOs. University Press of Kansas.
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Eghigian, G. (2024). After the Flying Saucers Came: A Global History of the UFO Phenomenon. Oxford University Press.
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Murphy, M. P. A. (2023). The “UFO Taboo” Is What IR Theorists Make of It. International Studies Review.
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UAP Field Investigations & Instrumentation
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Ailleris, P. (2011). The lure of local SETI: Fifty years of field experiments. Acta Astronautica, 68(1–2), 2–15. https://doi.org/10.1016/j.actaastro.2010.07.014
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Teodorani, M. (2004). A Long-Term Scientific Survey of the Hessdalen Phenomenon. Journal of Scientific Exploration, 18(2), 217–251.
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Watters, W. A., Loeb, A., Laukien, F., Cloete, R., Delacroix, A., Dobroshinsky, S., Horvath, B., Kelderman, E., Little, S., Masson, E., Mead, A., Randall, M., Schultz, F., Szenher, M., Vervelidou, F., White, A., Ahlström, A., Cleland, C., Dockal, S., & ... (2023). The scientific investigation of unidentified aerial phenomena (UAP) using multimodal ground-based observatories. Journal of Astronomical Instrumentation, 12(1), 2340006. https://doi.org/10.1142/S2251171723400068
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Tedesco, J. J., & Tedesco, G. T. (2024). Eye on the Sky: A UAP research and field study off New York’s Long Island coast. Open Journal of Applied Sciences, 14, 2267–2295. https://doi.org/10.4236/ojapps.2024.148152
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Szydagis, M., Knuth, K. H., Kugielsky, B. W., & Levy, C. (2025). Initial results from the first field expedition of UAPx to study unidentified anomalous phenomena. Progress in Aerospace Sciences, 156, 101099. https://doi.org/10.1016/j.paerosci.2025.101099
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Knuth, K. H., Szydagis, M., Frolov, V., & et al. (2025). The new science of Unidentified Aerospace-Undersea Phenomena (UAP). Progress in Aerospace Sciences.
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Materials & Forensics
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Sturrock, P. A. (Ed.). (1998). Physical Evidence Related to UFO Reports: Proceedings of a Workshop. Journal of Scientific Exploration, 12, 179–229.
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Powell, R. M., Swords, M., Rodeghier, M., & Budinger, P. (2022). Isotope Ratios and Chemical Analysis of the 1957 Brazilian Ubatuba Fragment. Journal of Scientific Exploration, 36(1), 39–49.
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Nolan, G. P., Vallée, J. F., Jiang, S., & Lemke, L. G. (2022). Improved instrumental techniques, including isotopic analysis, applicable to the characterization of unusual materials with potential relevance to aerospace forensics. Progress in Aerospace Sciences, 128, 100788.
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Risk, Policy, and Scenarios
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Baum, S. D., Haqq-Misra, J. D., & Domagal-Goldman, S. D. (2011). Would contact with extraterrestrials benefit or harm humanity? A scenario analysis. Acta Astronautica, 68, 2114–2129. https://doi.org/10.1016/j.actaastro.2010.10.012