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Submissions from 2011

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Animal play and animal welfare, Suzanne D.E. Held and Marek Špinka

Submissions from 2006

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When do octopuses play? Effects of repeated testing, object type, age, and food deprivation on object play in Octopus vulgaris., Michael J. Kuba, Ruth A. Byrne, Daniela V. Meisel, and Jennifer A. Mather

Submissions from 2000

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Bubble Ring Play of Bottlenose Dolphins (Tursiops truncatus): Implications for Cognition, Brenda McCowan, Lori Marino, Erik Vance, Leah Walke, and Diana Reiss

Submissions from 1984

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Social Play Behavior, Marc Bekoff