Study of copper complexes adsorbed on a silica gel surface chemically modified with 2-amino-1,3,4-thiadiazole - Dias Filho, Newton Luiz; Gushikem, Yoshitaka; Franco, Douglas Wagner; Schultz, Mário Sergio; Vasconcellos, Luiz Constantino Grombone (Colloids and Surfaces A, 1998)