Larsson , Erik, Ann-Catrin Andersson, and B. Ove Nilsson. “Expression of an Endogenous Retrovirus (ERV3 HERV-R) in Human Reproductive and Embryonic Tissues—Evidence for a Function for Envelope Gene Products”. Upsala Journal of Medical Sciences 99, no. 2 (July 19, 1994): 113-120. Accessed April 6, 2026. https://ujms.net/index.php/ujms/article/view/6711.