BOURDAUD, G. An Introduction to Composition Operators in Sobolev Spaces. Eurasian Mathematical Journal, [S. l.], v. 14, n. 1, p. 39–54, 2023. DOI: 10.32523/2077-9879-2023-14-1-39-54. Disponível em: https://emj.enu.kz/index.php/main/article/view/279. Acesso em: 22 oct. 2026.