1. Vitamin-A-Säure in der Tumortherapie;Bollag;Schweiz. med. Wschr.,1971
2. Therapy of chemically induced skin tumors of mice with vitamin A palmitate and vitamin A acid;Bollag;Experientia,1971
3. Effects of vitamin A acid (NSC-122758) on transplantable and chemically induced tumors;Bollag;Cancer Chemother. Rep.,1971
4. An inhibitory effect of vitamin A on the induction of tumors of forestomach and cervix in the syrian hamster by carcinogenic polycyclic hydrocarbons;Chu;Cancer Res.,1965
5. Effect of vitamin A on 7, 12-dimethylbenz(α)anthracene-induced papillomas in rhino mouse skin;Davies;Cancer Res.,1967