Orakwelu, Maduabuchi, Michael Egwurube, Usman Aminu Bawa, and Chidinma Nwosu. “On the Asymptotic Stability and Contraction of an Evolution Equation”. MATEMATIKA 30 (December 1, 2014): 185–188. Accessed April 19, 2024. https://matematika.utm.my/index.php/matematika/article/view/709.