1. Alles, G. A., A. J. Haagen-Smith, G. A. Feigen, and W. B. Dandliker: Evidence of another physiologically active principle in Cannabis sativa (marihuana). J. Pharmacol. exp. Ther. 76, 21?26 (1942).
2. Carlini, E. A., and C. Kramer: Effects of Cannabis sativa (marihuana) on maze performance of the rat. Psychopharmacologia (Berl.) 7, 175?181 (1965).
3. Chen, G., B. Bohner, and A. C. Bratton jr.: The influence of certain central depressants on fighting behavior of mice. Arch. int. Pharmacodyn. 142, 30?34 (1963).
4. Chopra, R. N., G. S. Chopra, and I. C. Chopra: Cannabis sativa in relation to mental diseases and crime in India. Indian J. med. Res. 30, 1?15 (1942).
5. Gayer, H.: Pharmakologische Wertbestimmung von orientalischen Haschisch und Herba Cannabis indica. Naunyn-Schmiedebergs Arch. exp. Path. Pharmak. 129, 312?318 (1928).