1. The occurrence of methyladenine, dimethyl-histamine, guanidine, betaine, and elodinine in Geodia gigas;Ackermann;Zeitschrift fuer Biologie,1924
2. Isolation of casimiroedine from seeds of Casimiroa edulis;Aebi;Helvetica Chimica Acta,1956
3. Cactaceae alkaloids VII: Alkaloids of Echinocereus merken;Agurell;Journal of Pharmaceutical Sciences,1969
4. Identification of histamine N, N-dimethylhistamine, N-acetyl-histamine, and acetylcholine in Spinacia oleracea;Appel;Arzneimittel-Forschung,1959
5. Cactaceae;Benson,1969