D. Prakash, S. Prasad, R. Chandra, and O. Gupta, “Alkali Metal complexes: Mixed Ligand Complexes of Alkali Metal salts of Picolinic acids, Quinaldinic acid and their N-Oxides with 1, 10-Phenanthroline Mono-N-Oxide ”, ajc, vol. 5, no. 4, pp. 916–919, Mar. 2010.