1. An epidemiological study of young women with dysmenorrhea;Andresh;Am J Obstet Gynecol,1982
2. Epidemiology of adolescent dysmenorrhea;Klein;Pediatrics,1981
3. Current status of etiology and management of dysmenorrhea in adolescents;Alvin;Pediatrics,1982
4. Endometriosis;Guidice;Lancet,2004
5. Endometriosis;Bulun;NEJM,2009