1. Ballon, H. C., Strean, G. J., and Simon, M. A. Obstructive ulcerated endometriosis of the rectum diagnosed by proctoscopic biopsy. Can. Med. Assoc. J. 74: 817, 1956.
2. Benz, E. S., Dockerty, M. B., and Dixon, C. F. Polypoid endometrioma of colon; case in which unusual pathologic features were present. Proc. Staff Meet., Mayo Clin. 27: 201, 1952.
3. Biebl, M. Bauchferne Endometriose am Unterarm und ihre Bedcutting fur eine neue Lehre von cincr einheitlich mesenchymalen Genese der Endometriosen allgemein. Zentralbl. f. Chir. 65: 1026, 1938.
4. Bose, A., and Dayson, J. Endometriosis of the small intestine. Br. J. Surg. 56: 109, 1969.
5. Bungeler, W., and Fleury Silveira, D. Consideracos sobre a patogenia das endometrioses (a proposito de tres casos de endometriose externs). Arg. de cir. clin. 3 exper. 3:169, 1939; Abstr. in Obstet. Gynecol. Surv. 1:408, 1946.