case-report 1999 Abdominal wall endometriosis in absence of previous surgery Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine ·doi:10.7863/jum.1999.18.5.373
case-report 1997 Intestinal endometriosis as a cause of chronic abdominal pain leading to intestinal obstruction The American journal of gastroenterology