Barnard, 1956, Minn. Med., 39, 745
Boley, 1963, Surgery Gynec. Obstet., 116, 53
Ehrenpreis, 1965, Archs Dis. Childh., 40, 180, 10.1136/adc.40.210.180
Engelhardt, 1956, Radiology, 67, 573, 10.1148/67.4.573
Hukuhara, 1961, Jap. J. Physiol., 11, 635, 10.2170/jjphysiol.11.635
Sumi, 1961, Jap. J. Physiol., 11, 281, 10.2170/jjphysiol.11.281
Louw, 1959, Leech, Johannesb., 29, 111
Louw, 1959, Ann. R. Coll. Surg., 25, 209
Louw, 1959, Med. Proc, 5, 208
Louw, 1961, S. Afr. med. J., 35, 1033
Louw, 1964, Dis. Colon Rectum, 7, 471, 10.1007/BF02616944
Louw, 1955, Lancet, 2, 1065, 10.1016/S0140-6736(55)92852-X
McElhannon, 1960, Surg. Forum, 10, 218
Reeves, 1961, 8th. med. J., Nashville, 54, 541, 10.1097/00007611-196105000-00015
Schwartz, 1963, Radiology, 80, 625, 10.1148/80.4.625
Wang, 1960, Am. J. Radiol., 83, 895
Wolf, 1956, Radiology, 66, 701, 10.1148/66.5.701
