1) Andersch B, Milsom I. An epidemiologic study of young women with dysmenorrhea. American Journal of Obstetrics and Gynecology 1982; 144: 655-660.
2) Harlow SD, Park M. A longitudinal study of risk factors for the occurrence, duration and severity of menstrual cramps in a cohort of college women. British Journal of Obstetrics and Gynaecology 1996; 103: 1134-1142.
3) Montero P, Bernis C, Fernandez V, et al. Influence of body mass index and slimming habits on menstrual pain and cycle irregularity. Journal of biosocial Science 1996; 28: 315-323.
4) Sundell G, Milson I, Andersch B. Factors influencing the prevalence and severity of dysmenorrhoea in young women. British Journal of Obstetrics and Gynaecology 1990; 97: 588-594.
5) Teperi J, Rimpelä M. Menstrual pain, health and behaviour in girls. Social Science Medicine 1989; 29: 163-169.