Auteur : Kirk R. Johnson. 1 Functional and Evolutionary significance of the recruitment and firing patterns of the jaw adductors during chewing in verreaux's sifaka (Propithecus verreauxi). Titre de la série : American Journal of Physical Anthropology. 2011/08. Auteurs : Christine E. Wall. Christopher J. Vinyard. Kirk R. Johnson. Susan H. Williams. William L. Hylander.