Gao, H.-W.; Gu, J.-S.; Shi, S.-R.; Ye, H. Updated Spectrophotometric Investigation of Neodymium Complexes Formed With 1-(2-Pyridylazo-2-Naphthal and 2-(5-Bromo-2-Pyridylazo)-5-Diethylamino-M-Phenol . ajc 2010, 14, 349-356.