Angelova, M. A., E. G. Kovachev, I. Kozovski, Y. D. Kornovski, S. V. Kisyov, and V. R. Ivanova. “A Case of Secondary Abdominal Pregnancy After in Vitro Fertilization Pre-Embryo Transfer (IVF-ET)”. Open Access Macedonian Journal of Medical Sciences, vol. 3, no. 3, June 2015, pp. 426-8, doi:10.3889/oamjms.2015.070.