1. Lieber die basischen Inhaltstoffe von Cannabis sativa;Salemink;Planta Medica,1965
2. On the Basic Principles of Cannabis;Bercht,1969
3. Volatile Constituents of Cannabis sativa L;Bercht,1971
4. Chemie en Farmakokinetiek van Hashish en Marihuana Bestanddelen;Vree;Chemisch Weekblad,1972
5. On the Presence of Basic Indole Components in Cannabis sativa L;Samrah,1972