1. Process of Making Aliphatic Polyureas;Wilfred,1939
2. Polyureas of Aromatic Diamines and Aromatic Diisocyanates;Katz,1959
3. Baked Polyurea Coatings;Hudson;Ind. Eng. Chem.,1959
4. Greases Thickened with Polyurea;Dreher,1966
5. Polyurethanes and polyureas having long methylene chain units;Saotome;J. Polym. Sci. A1,1967