1. T.Ya. Smirnova, K.I. Ergazieva, E.E. Ergozhin and B.A. Mukhitdinova, Method of preparation of soluble anion-exchangers, USSR Patent, 642323 1977
2. Bildungs des p-Rhodananiline;Kaufman;Ber.,1929
3. Synthesis of phosphorous containing polymers forming stable complexes with metals;Kennedy;J. Appl. Chem.,1958
4. Synthesis of phosphorous containing polymers forming stable complexes with metals;Kennedy;J. Appl. Chem.,1958
5. Chelatbildene Ionenaustauscher;Hering,1967