1. CARBOWAX® Polyethylene Glycols, Technical Bulletin F-4772E, Union Carbide Chemicals Division, New York (1960).
2. Dow Polyethylene Glycols, Technical Bulletin 125-230-57;,1959
3. Polyethylene Glycols, Technical Bulletin OC-107-1061 and PC-108-1061,1961
4. Pluracol E, Technical Data,1960
5. Polyethylene Glycols, Technical Bulletin,1961