Journal article
Nest and egg clutches of the dinosaur Troodon formosus and the evolution of avian reproductive traits
Citation
Varricchio, D. J.; Jackson, F.; Borkowski, J. J.; Horner, J. R. (1997). Nest and egg clutches of the dinosaur Troodon formosus and the evolution of avian reproductive traits. Nature 385(6613): 247-250. doi:10.1038/385247a0