1. Zur Kasuistik primärer doppelseitiger maligner Nierentumoren;Wagner;Folia Urolog.,1912
2. Simultaneous occurrence of medullary carcinoma of pelvis of one kidney and hypernephroma of other kidney;Camerer;Ztschr. f. Path.,1940
3. Bilateral hypernephroma: Case report;Senger;J. Urol.,1947
4. Review of 271 cases of malignant renal neoplasms;Hunt;S. Clin. N. America.,1929
5. Carcinoma of both kidneys. Report of a case with review of the literature on multiple primary malignant tumors;Sanford;Surg., Gynec. & Obst.,1931