Every reference with a DOI in the deposited reference list resolved to a known
work in Crossref or DataCite at the dated check, and none carried a retraction,
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Nature and conditions of avoidance (fear) response in chimpanzee.
The 5 references without a DOI — listed, not checked
no DOI — not checkedMarks, I. Flooding (implosion) and allied treatments. In W. S. Agras (Ed.),Behavior modification: Principles and clinical applications. Boston: Little, Brown, 1972.
no DOI — not checkedMorris, R., &Morris, D. Men and snakes. London: Hutchinson, 1965.
no DOI — not checkedRachman, S. Fear and courage. San Francisco: Freeman, 1978.
no DOI — not checkedSackett, G. P. Measurement in observational research. In G. P. Sackett (Ed.),Observing behavior (Vol. 2). Baltimore: University Park Press, 1978.
no DOI — not checkedStephenson, G. R. Cultural acquisition of a specific learned response among rhesus monkeys. In D. Starck, R. Schneider, & H. J. Kuhn (Eds.),Progress in Primatology. Stuttgart: Gustav Fischer Verlag, 1967.
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