1. 2F.W. Dynys , "Alpha Alumina Formation in Alumina Sol-Gels ": Ph.D Dissertation . Case Western Reserve University. Cleveland, OH, 1985 .
2. 3W. Wei, and J.W. Halloran . "Processing and Structures of Silica Sols and Gels"; unpublished work.
3. 5K. Wefers, and G.M. Bell . "Oxides and Hydroxides of Aluminum." Technical Paper No. 19, ALCOA Lab. Pittsburgh. PA. 1972 .