1. 1880 Die Missbildungen des Menschen. I. Spaltung, Doppelbildung und Verdoppelung. Leipzig. 248-265.
2. 1954 Urology. W. B. Saunders Company, Philadelphia. Vol. I, 370-372.
3. 1906-07 Genetic interpretation and surgical significance of some variations of the genito-urinary tract. Harvey Lectures. The Harvey Soc., N. Y., J. B. Lippincott Company, Philadelphia, 222-267.
4. CAUSES AND PREVENTION OF DEVELOPMENTAL DEFECTS