Yanovska E. S., Kuzovenko V. A., Тертых В. А., Кичкирук О. Ю. (2007) Complex formation of heavy metals with 4-(2-pyridy-lazo) resorcinol chemically immobilized on silica gel. Russian Journal of Coordination Chemistry, 33 (8). С. 616–620. ISSN 1070-3284