Zutshi, V., M. Gupta, P. Kaur, A. Malik, S. Zaheer, and P. Gambhir. “Office Endometrial Sampling: A Comparison Between Endosampler and Karman Cannula Number 4”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 7, no. 10, Sept. 2018, pp. 3965-8, doi:10.18203/2320-1770.ijrcog20183874.