Dierentuinhypothese (Dutch Wikipedia)

Analysis of information sources in references of the Wikipedia article "Dierentuinhypothese" in Dutch language version.

refsWebsite

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archive.org

(en) Peter Ulmschneider (2006). Intelligent Life in the Universe: Principles and Requirements Behind Its Emergence. Springer Berlin. ISBN 9783540328360.

doi.org

(en) John A. Ball (1973). The Zoo Hypothesis 19 (3): 347-349 (Icarus). DOI: 10.1016/0019-1035(73)90111-5.

harvard.edu

ui.adsabs.harvard.edu

(en) John A. Ball (1973). The Zoo Hypothesis 19 (3): 347-349 (Icarus). DOI: 10.1016/0019-1035(73)90111-5.