Konshina, D.N., Open’ko, V.V., Temerdashev, Z.A. and Konshin, V.V. 2019. Silica gel with covalently immobilized thiosemicarbazide for dynamic preconcentration of copper(II) and zinc(II). Sorbtsionnye i Khromatograficheskie Protsessy. 16, 5 (Nov. 2019).