Removal of Cu, Ir, Pd and Os Ions in the Form of Chelates from Wastewaters by Naphthalene S. A. Wasay, S. Tokunaga, M. J. Haron, A. Uchiumi, T. Nagahiro, and B. K. Puri [J. Environ. Sci. Health, Vol.A29, No.9, pp.1817-1828, 1994]