1. Adrian, J., R. Frangne, J. Xabregas et A. Côrte nos Santos: Teneur en vitamine PP des cafés grillés de l’Angola. Luanda: Instituto do Café de Angola 1967.
2. Alpinus, P: De plantis aegypti liber. Venedig: Franciscus de Franciscis Senensis 1592.
3. Amerine, M. A., Rose Marie Pangborn, and E. B. Roessler: Principles of sensory evaluation of food. New York: Academic Press 1965.
4. Anonymus: Facts about coffee. New York: Coffee Brewing Center, ca. 1967.
5. AOAC (Association of Official Agricultural Chemists):: Official Methods of Analysis. 10. Aufl. Washington D. C., 1965.