Darakamas, M., P. Tanmahasamut, K. Techatraisak, M. Rattanachaiyanont, S. Indhavivadhana, T. Wongwananuruk, P. Chantrapanichkul, and N. Pingkul. “Causes of Secondary Amenorrhea: A report of 437 cases in Thailand”. Thai Journal of Obstetrics and Gynaecology, vol. 31, no. 5, Sept. 2023, pp. 334-40, doi:10.14456/tjog.2023.38.