Baghdad, Said. “Existence and Stability of Solutions for a System of Quadratic Integral Equations in Banach Algebras”. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica 19 (December 15, 2020): 203–218. Accessed May 3, 2024. https://studmath.uken.krakow.pl/article/view/7934.