1. Synthesis and water absorbency of the copolymer of acrylamide with anionic monomers
2. Synthesis and swelling properties of the copolymer of acrylamide with anionic monomers
3. Tsubakimoto T, Shimomura T, Kobabyashi H. Jpn Patent 1987;62,149,335
4. Miura Y, Hirano K, Nate T, Kambayashi T, Ohtsuka M, Nagai T. Eur Patent 1991;440,256
5. Tanaka H, Kambayashi T, Sugiyama Y, Nagai T, Nagata K, Kubota K, Hirano K. Eur Patent 1992;501,482