Submissions from 2006
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 2001
Social Play Behaviour: Cooperation, Fairness, Trust, and the Evolution of Morality, Marc Bekoff
The Evolution of Animal Play, Emotions, and Social Morality: On Science, Theology, Spirituality, Personhood, and Love, Marc Bekoff
Mammalian Play: Training for the Unexpected, Marek Špinka, Ruth C. Newberry, and Marc Bekoff
Submissions from 2000
Bubble Ring Play of Bottlenose Dolphins (Tursiops truncatus): Implications for Cognition, Brenda McCowan, Lori Marino, Erik Vance, Leah Walke, and Diana Reiss
Submissions from 1995
Play Signals as Punctuation: The Structure of Social Play in Canids, Marc Bekoff
Submissions from 1974
Social Play and Play-Soliciting by Infant Canids, Marc Bekoff
Social Play in Coyotes, Wolves, and Dogs, Marc Bekoff
