Larsson E., Andersson A.-C. and Nilsson B.O. 1994. 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, 2 (Jul. 1994), 113-120. DOI:https://doi.org/10.3109/03009739409179354.