John, E. R., Chesler, P., Bartlett, F., & Victor, I. (1968). Observation Learning in Cats. Science, 159(3822), 1489–1491.
Abstract: In two experiments cats acquired a stimulus-controlled approach or avoidance response by observational or conventional shaping procedures. Observer cats acquired the avoidance response (hurdle jumping in response to a buzzer stimulus) significantly faster and made fewer errors than cats that were conventionally trained. Observer cats acquired the approach response (lever pressing for food in response to a light stimulus) with significantly fewer errors than cats that were conventionally trained. In some cases, observer cats committed one or no errors while reaching criterion.
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Tavernor, W. D., & Lees, P. (1968). A pharmacological investigation of the influence of suxamethonium on cardiac function in the horse. Experientia, 24(6), 582–583.
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Rossdale Pd,. (1968). Abnormal perinatal behaviour in the thoroughbred horse. Brit Vet J., 124, 540–553.
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Klingel H Klingel U,. (1968). Equus quagga: Paarungsverhalten.
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Klingel H Klingel U,. (1968). Equus quagga: Kampfverhalten.
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Klingel H Klingel U,. (1968). Equus quagga: Begrüßung.
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Klingel H Klingel U,. (1968). Equus quagga: Hautpflegeverhalten.
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Urban Ek, B. L. (1968). Wildlife in an ethiopian valley. Oryx, 9, 342–353.
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Tembrock G,. (1968). Land mammals. (pp. 338–404).
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Zeeb K,. (1968). Paarungsverhalten von Rind und Pferd im Herdenverband. Z Tierzüchtung Züchtungsbiol, 84, 229–235.
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