article 2001 Efficacy of presacral neurectomy for treatment of central pelvic pain and dysmenorrhea ·doi:10.1016/s1074-3804(01)80215-2
article 1999 Appendicele endometriosis may be associated with endometriosis of the abdomen and pelvis ·doi:10.1016/s1074-3804(99)80230-8