1. Unsaturated polyesters;Boenig,1964
2. Polyesters and their applications;Bjorksten,1956
3. Ellis C. Glycol-maleic acid resin and process of making same (1936) U.S. Patent 2,195,362.
4. Rubber technology;Morton,1973
5. Observations as to the Formation of Synthetic Resins1