Journal article
A nest of Protoceratops andrewsi (Dinosauria, Ornithischia)
Citation
Fastovsky, D. E.; Weishampel, D. B.; Watabe, M.; Barsbold, R.; Tsogtbaatar, K.; Narmandakh, P. (2011). A nest of Protoceratops andrewsi (Dinosauria, Ornithischia). Journal of Paleontology 85(6): 1035-1041. doi:10.1666/11-008.1