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Introduction.
Sandler H, Vernikos J, Wegmann HM, Klein KE. Sandler H, et al. Among authors: klein ke. Acta Astronaut. 1995 Feb-Mar;35(4-5):247-51. doi: 10.1016/0094-5765(95)90004-7. Acta Astronaut. 1995. PMID: 11541469
Air operations and circadian performance rhythms.
Klein KE, Wegmann HM, Athanassenas G, Hohlweck H, Kuklinski P. Klein KE, et al. Aviat Space Environ Med. 1976 Mar;47(3):221-30. Aviat Space Environ Med. 1976. PMID: 769776 Review.
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