Jauniaux, E., Donner, C., Simon, P., Vanesse, M., Hustin, J., & Rodesch, F. (1989). Pathologic Aspects of the Umbilical-cord After Percutaneous Umbilical Blood-sampling. Obstetrics and Gynecology, 73(2), 215-218. https://hdl.handle.net/2078.5/139469 (Original work published 1989)