KIZILKAYA, C., M. BICEN, S. KARATAS, and A. GUNGOR. “Structural Effects of the Monomer Type on the Properties of Copolyimides and copolyimide–silica Hybrid Materials”. Journal of the Serbian Chemical Society, vol. 80, no. 8, Sept. 2015, pp. 1061–1071, doi:10.2298/JSC141014029K.