Oka, Victor Otu, et al. “Methanolic Extract of Malus Domestica Mitigates Formalin - Induced Derangements in Small Intestinal Motility and Transit”. Asian Journal of Medical Sciences, vol. 5, no. 3, Feb. 2014, pp. 45-50, https://nepjol.info./index.php/AJMS/article/view/9106.