References
- Broun, Le Roy (1921) Am. Journ. of Obstet. and Gyn.
- Forestier, J. and Michon, L. (1920) Paris med.
- Leglec, F. (1920) Bull, et mem. soc. chir.
- Morrisey, J. H. and Smith, F. W. (1924) Med. Journ. and Record. N. Y.
- Nichols, H. B. Am. J. of Rad.
- Prades, D. (1922) Bull. soc. rad. France
- Wossidlo, E. Z. f. urol. Chir. Bd., 10