1. JECFA specifications for identity and purity of thickening agents and emulsifiers,1978
2. Directive 78/663/EEC. Offic. J. European Communities, No. L223/13, 14/8/78.
3. Tragacanth, Food Chemicals Codex III, Monographs, p. 337.
4. Gum tragacanth - fractionation of the gum and the structure of tragacanthic acid and the arabogalactan;Aspinall;J. Chem. Soc.,1963