Licini, C., C. Avellini, G. Tossetta, N. Di Simone, M. Castellucci, and D. Marzioni. “Human Trophoblast Differentiation: Possible Role for Trophoblast Cell Surface Antigen 2”. Italian Journal of Anatomy and Embryology, vol. 122, no. 1, Oct. 2017, p. 118, https://oajournals.fupress.net/index.php/ijae/article/view/1928.