article 1952 Ruptured Endometrial Cysts as a Cause of Acute Abdominal Symptoms (Endometrial Pelviperitonitis) ·doi:10.1016/s0002-9378(16)38977-3
article 1950 Experimental studies on proteolytic enzymes in the endometrium of pregnancy, to explain certain clinical phenomena in endometriosis American journal of obstetrics and gynecology ·doi:10.1016/0002-9378(50)90466-2