海量图书期刊资源，随时随地畅享阅读乐趣
Rollovers during play: Complementary perspectivesSmuts, Barbara; Bauer, Erika; Ward, Camille · Behavioural Processes · 2015
Partner preferences and asymmetries in social play among domestic dog, Canis lupus familiaris, littermatesCamille Ward; Erika B. Bauer; Barbara B. Smuts · 2008