Baouche, Amar. “On the Existence of Solutions of a Nicoletti Problem for an Integro-Differential Equation With Advanced Argument”. Annales Mathematicae Silesianae 4 (September 28, 1990): 7–13. Accessed May 6, 2025. https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14288.