ATANASOVA, P.; GEORGIEVA, A.; TRENKOVA, L. EXISTENCE OF CONTINUOUS SOLUTIONS OF A PERTURBED LINEAR VOLTERRA INTEGRAL EQUATIONS. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 103, p. 79–88, 2016. Disponível em: https://stipendii.uni-sofia.bg/index.php/fmi/article/view/56. Acesso em: 4 dec. 2024.