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Citations
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Formozov A.N. (1952). Tiger and snow leopard.
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Formozov A.N. (1989). Tiger. Leopard. Snow Leopard.
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Sloane, A., Kelly, C., McDavitt, S., & Marples, N. (1998). Big cats in captivity: a quantitative analysis of enrichment. Adv.Etho, 33, 43.
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