1. Seed oil of white star apple (Chrysophyllum albidum)—physicochemical characteristics and fatty acid composition
2. 1974 Mexican Pinyon. Knowing Your Trees. American Forestry Association, Washington, DC, pp 18–19.
3. The colour of Pinus silvestris L. seed and their susceptibility to damping-off.
4. 1976 Descripcion de la Vegetation Montanosa en los Estados Mexicanos de Puebla y Tlaxcala. Willdenowia Mitteilungen aus dem botanischen Garten und botanischen Museum Berlin-Dahlem. pp 15–16.
5. 1973 Encyclopedia of Fruits, Vegetables, Nuts and Seeds for Healthful Living. Parker Publishing Company, West Nyack, New York, pp 32–33, 144.