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2. L'epistasis et sa signification pathologique;Duhamel, B.;Ann. Chir. in. (Paris),1960
3. Congenital malformations of the rectum and anus;Moore, T.C.; Lawrence, E.A.,1952
4. Associated anomalies encountered in a series of 120 cases;281. Parkkulainen, K. V;Surg. Gynec. Obstet; Sacrococcygeal and urological anomalies in connection with congenital malformations of anus and rectum. A preliminary report,1957
5. Pathology of the Fetus and the Newborn;Potter, E.L.,1952