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2. Manifestations psychiatriques de l'intoxication au khat;Ardouin;Méd. Armées,1976
3. Extractives of Catha edulis: Occurrence of celastraceous alkaloids having mono- and bis-macrolide bridges;Baxter;J. Chem. Soc. chem. Commun.,1976
4. Structures of cathedulin-2 and cathedulin-8, new sesquiterpene alkaloids from Catha edulis;Baxter;J. Chem. Soc. chem. Commun.,1976
5. Research on the chemical composition of khat;Braenden,1979