Park, KH; Song, CH (Feb 1995). "Bone mineral density in premenopausal anovulatory women". Journal of Obstetrics and Gynaecology. 21 (1): 89–97. doi:10.1111/j.1447-0756.1995.tb00903.x. PMID8591116.
Park, KH; Song, CH (Feb 1995). "Bone mineral density in premenopausal anovulatory women". Journal of Obstetrics and Gynaecology. 21 (1): 89–97. doi:10.1111/j.1447-0756.1995.tb00903.x. PMID8591116.