المؤلفون: Asher, Robert J., Meng, Jin, Wible, John R., McKenna, Malcolm C., Rougier, Guillermo W., Dashzeveg, Demberlyn, Novacek, Michael J.

المصدر: Science, 2005 Feb . 307(5712), 1091-1094.

URL الوصول: https://www.jstor.org/stable/3840159