1. AOAC (1990 ). Official Methods of Analysis , 14th edn. p. 777 , 777 , 777 , 777 , 777 . Washington, DC: Association of Official Analytical Chemists.
2. M.C. Bourne (1982 ). Food Texture and Viscosity: Concept and Measurement . Pp. 64 -65 , 64 -65 . London: Academic Press.