Solvability conditions for functional equations with a differentiable λ-injective operator. Neliniini Kolyvannya, [S. l.], v. 19, n. 3, p. 399–407, 2016. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/838. Acesso em: 21 jan. 2026.