Zidan, Mohammed, et al. “Electrochemical Detection of Ascorbic Acid Using Fe-Mn-SO4-2- Zro2(FMSZ) Modified Glassy Carbon Electrode”. Journal of Pure & Applied Sciences , vol. 17, no. 1, July 2018, pp. 439-44, https://doi.org/10.51984/jopas.v17i1.187.