Kumar Yadav, V.; Kumar Paliwal, K.; Kumar, S.; Kishore Gupta, B.; Goswami, A.; Purohit, D. Complexmetric Determination of Chromium(III) from Binary and Ternary Metal Ion Mixture Using 3-Hydroxy-3-P-Nitrophenyltriazene . ajc 2010, 12, 890-892.