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Aspinall, J. (1978). Some aspects of breeding tigers and other big cats. Friends of Howletts and Port Lympne, 1(Spring), 26–32.
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Houston Zoological Society. (1979). Houston's summer snow.
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Hansen, J. (1980). The snow leopard study, part one.
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Chubykina, H. L., Shilo, R.A. (1981). A study of diurnal activity rhythms in snow leopards and lynx (Panthera uncia and Felix lynx) at Novosibirsk Zoo. International Zoo Yearbook, 21, 193–196.
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Clevenger, S., S. (1979). Breeding snow leopards in the north 40.
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Clevenger, S. (1980). Snow leopards: Captivity perpetuates the species (Vol. XVI).
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Encke, B. (1966). The breeding of snow leopards (Uncia uncia) in the Krefeld Zoo. Freunde des Kolner Zoo, 9(Winter 1966/1967), 145–146.
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Seneca Park Zoo. Meat loan saves leopard.
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Woodland Park Zoo. (1980). No vacancy.
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