“Natural Bond Orbital Analysis of [Fe(H2O)6]2+/3+ and [Zn(H2O)6](H2O)N2+;N=0-4”, J. Inst. Sci. Tech., vol. 22, no. 2, pp. 148–155, Apr. 2018, doi: 10.3126/jist.v22i2.19607.