KUTLAY, H.; YAKAR, A. Existence of extremal solutions for a class of fractional integro-differential equations. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 115, n. 3, p. 112–125, 2024. DOI: 10.31489/2024m3/112-125. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/819. Acesso em: 1 jul. 2025.