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2 Cornsweet TN, "Visual Perception" Academic press, New York, NY. 475-, 1970
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4 Gallup GG, "Tonic immobility; the role of fear and predation" 27 : 41-61, 1977
5 Jones RB, "Tonic immobility in the domestic fowl as a function of social rank" 7 : 27-32, 1982
6 Jones RB, "Tonic immobility (righting time) in laying hens housed in cages and pens" 7 : 369-372, 1981
7 Benoit J, "The role of the eye and of the hypothalamus in the photostimulation of gonads in the duck Ann" 117 : 204-215, 1964
8 ster RG Follett, "The involvement of a rhodopsin-like photopigment in the photoperiodic response of Japanese quile" 157 : 519-528, 1985
9 Downs KM, "The effects on photoperiod length, light intensity, and feed energy on growth responses and meat yield of broilers" 15 : 406-416, 2006
10 Wallnau LB, "The effects of quipazine fenfluramine and apomorphine on the morphine potentiation of tonic immobility, pharmacology" 15 : 895-901, 1981
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