1. Resins from mannitol and sorbitol;Brown;Ind. Eng. Chem.,1938
2. Butler J.A. and Vance J.J., U.S. Patent—3,365,365 (1968).
3. Product of the heating of rosin and glycerol as an anhydrous binder in tablet preparation;Surowiecki;Farm. Pol.,1971
4. Glycerol esters of Rosin;Kogan;J. Am. Chem. Assoc.,1932
5. United States Pharmacopoeia, Mark Publishing, Easton, PA, 18th Revision, pp. 959–960.