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2. Incidence of carcinoma in situ of germ cells in contralateral testis in men with testicular tumors;Berthelsen;Br Med J,1979
3. Atypical germ cells preceding metachronous bilateral testicular tumors;Andres;Urology,1980
4. Studies in malignant tumors of the testis: IV Bilateral testicular cancer. Incidence, nature, and bearing upon management of the patient with asingle I cancer;Hamilton;Cancer Res,1942
5. Atypische Spermatogonien als Prakanzerose;Nuesch-Bachmann;Schwetz med Wschr,1977