Prakash, D., K.B. Sinha, B. Kumar, and Anu K. Gupta. 2010. “Mixed Ligand Complexes of Alkali Metal Salts of Some Organic Acids With Picolinic Acid”. Asian Journal of Chemistry 13 (1):211-14. https://asianpubs.org/index.php/ajchem/article/view/22551.