Jauniaux, E., Elkazen, N., Leroy, F., Wilkin, P., Rodesch, F., & Hustin, J. (1988). Clinical and Morphologic Aspects of the Vanishing Twin Phenomenon. Obstetrics and Gynecology, 72(4), 577-581. https://hdl.handle.net/2078.5/43390 (Original work published 1988)