GUBBIOTTI, Giorgio; LEVI, Decio; SCIMITERNA, Christian. ON PARTIAL DIFFERENTIAL AND DIFFERENCE EQUATIONS WITH SYMMETRIES DEPENDING ON ARBITRARY FUNCTIONS. Acta Polytechnica, [S. l.], v. 56, n. 3, p. 193–201, 2016. DOI: 10.14311/AP.2016.56.0193. Disponível em: https://ojst.is.cvut.cz/ojs/index.php/ap/article/view/3411.. Acesso em: 12 may. 2025.