RYCKELYNCK , Philippe; SMOCH, Laurent. On the functional equation αu + C ⋆ (χu) = f. North-Western European Journal of Mathematics, [S. l.], n. 4, p. 1–20, 2017. Disponível em: https://nwejm.univ-lille.fr/index.php/nwejm/article/view/42.. Acesso em: 18 oct. 2024.