Journal article
A theropod dinosaur embryo and the affinities of the Flaming Cliffs Dinosaur eggs
Citation
Norell, M. A.; Clark, J. M.; Dashzeveg, D.; Barsbold, R.; Chiappe, L. M.; Davidson, A. R.; McKenna, M. C.; Perle, A.; Novacek, M. J. (1994). A theropod dinosaur embryo and the affinities of the Flaming Cliffs Dinosaur eggs. Science 266(5186): 779-782. doi:10.1126/science.266.5186.779