S. Pandey, M. Sharma, O. Pandey, and S. Sengupta, “Macrocyclic Zn(II) Complexes: Synthesis, Structure and Hydrolysis of p-Nitrophenyl Acetate (pNPA)”, J. Inst. Sci. Tech., vol. 20, no. 2, pp. 42–48, Nov. 2015.