M.A, H., M. Zain, S., Jefrey B, W., S.M, R., Rohaiza S.O, S., Abdullah, N., & H.L, T. (2004). Spectral, electrochemical and anti-microbial studies of nicotinic acid hydrazide Schiff base complexes of cobalt (II) and manganese (II). Malaysian Journal of Science, 23(1), 129–136. Retrieved from http://mojes.um.edu.my/index.php/MJS/article/view/8504