[1. Kensler, C. J., S. P. Battista: New Engl. J. Med. 269 (1963) 1161.10.1056/NEJM19631128269220214061124]Search in Google Scholar
[2. Izard, C., P. Testa: Annales SEITA 6 (1968) u1. ]Search in Google Scholar
[3. Wynder, E. L., D. Hoffmann: "Tobacco and tobacco smoke", Academic Press, New York, London, 1967. ]Search in Google Scholar
[4. Grob, K.: Beitr. Tabakforsch. 3 (1965) 2.43.]Search in Google Scholar