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Author  |
Title | Year | Publication | Volume | Pages |
|---|---|---|---|---|---|
| Formozov A.N. | Tiger. Leopard. Snow Leopard | 1989 | 38-40 | ||
| Formozov A.N. | Tiger and snow leopard | 1952 | 169 171 | ||
| Sloane, A.; Kelly, C.; McDavitt, S.; Marples, N. | Big cats in captivity: a quantitative analysis of enrichment | 1998 | Adv.Etho | 33 | 43 |