Okolonkwo, Benjamin, and Edna Nwachuku. “The Antioxidant Effects of Vitamin C on Liver Enzymes: Aspartate Aminotransferase, Alanine Aminotranferease, Alkaline Phosphatase and Gamma-Glutamyltransferase Activities in Rats under Paraquat Insult”. Journal of Xenobiotics 3, no. 1 (June 17, 2013): e5. Accessed June 17, 2019. https://www.pagepressjournals.org/index.php/xeno/article/view/xeno.2013.e5.