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Author Title (up) Year Publication Serial Volume Pages
Clement, T.S.; Feltus, J.R.; Kaiser, D.H.; Zentall, T.R. “Work ethic” in pigeons: reward value is directly related to the effort or time required to obtain the reward 2000 Psychonomic bulletin & review 248 7 100-106
Wasilewski A. 'Friendship' in ungulates? – Sociopositive relationships between non-related herd members of the same species 2003 824
Tschudin, A.J.-P.C. 'Mindreading' Mammals? Attribution of Belief Tasks with Dolphins 2001 Animal Welfare 3491 10 119-127
Nakagawa, S.; Waas, J.R. 'O sibling, where art thou?' – A review of avian sibling recognition with respect to the mammalian literature 2004 Biological Reviews of the Cambridge Philosophical Society 4567 79 101-119
Byrne R.W. - Animal Cognition in Nature, edited by Russell P. Balda, Irene M. Pepperberg and Alan C. Kamil 2000 Trends in Cognitive Sciences 3480 4 73-73
Cords, M. 13th Cong. Int. Primat Soc 1990 4925
Heptner Vg, 2. Wildpferd, Tarpan Equus (Equus przewalski Poljakov 1881) In: Die Säugetiere der Sowjetunion 1966 In: Heptner V G & Naumov N P (ed.) Jena 1181 858-874
Rashek Va, 24 hours regime of the onager and ist behviour in Barsa – Kelmes Island Aralsee 1964 1490
Bubenik Ab, 24-Stunden Rythmus des Przewalski-Pferdes E. przewalskii während der Laktation und beginnender Brunst 1961 979 1 122-140
Edwards, D.H.; Spitzer, N. 6. Social dominance and serotonin receptor genes in crayfish 2006 Current Topics in Developmental Biology 4364 74 177-199