Crawford, Ian A. External Organizations;
Schulze-Makuch, Dirk 3.7 Geomicrobiology, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
Crawford, I. A., Schulze-Makuch, D. (2024): Is the apparent absence of extraterrestrial technological civilizations down to the zoo hypothesis or nothing? - Nature Astronomy, 8, 44-49.https://doi.org/10.1038/s41550-023-02134-2