Simmons, D. G., Natale, D. R. C., Begay, V., Hughes, M., Leutz, A., & Cross, J. C. (2008). Early patterning of the chorion leads to the trilaminar trophoblast cell structure in the placental labyrinth.

Simmons, David G., David R. C. Natale, Valerie Begay, Martha Hughes, Achim Leutz, and James C. Cross. Early Patterning of the Chorion Leads to the Trilaminar Trophoblast Cell Structure in the Placental Labyrinth. 2008.

Simmons, David G., et al. Early Patterning of the Chorion Leads to the Trilaminar Trophoblast Cell Structure in the Placental Labyrinth. 2008.