2) Ranchod M, Kempson RL: Smooth muscle tumors of the gastrointestinal tract and retroperitoneum; A pathologic analysis of 100 cases. Cancer 39: 255-262, 1977
3) Shmookler BM, Lauer DH: Retroperitoneal leiomyosarcoma, a clinicopathologic analysis of 36 cases, Am J Clin Pathol 7: 269-280, 1983
4) Mittal K, Demopoulos RI: MIB-1 (Ki67), p53, estrogen receptor, and progesterone receptor expression in uterine smooth muscle tumors. Human Pathol 32: 984-987, 2001
5) Myerhofer K, Lozanov P, Bodner K et al: Ki-67 expression in patients with uterine leiomyomas, uterine smooth muscle tumors of uncertain malignant potential (STUMP) and uterine leiomyosarcomas (LMS). Acta Obstet Gynecol Scand 83: 1085-1088, 2004