Pal Singh, N., & Singh, J. (2012). Synthesis, Spectroscopic and Antimicrobial Studies on Copper(II), Cobalt(II), Nickel(II) and Manganese(II) Complexes of N-(2-Ethylphenyl) N’-Picolinoyl Hydrazine. Asian Journal of Chemistry, 25(1), 455–458. https://doi.org/10.14233/ajchem.2013.13160