ULANOVSKII, A. On Landau’s phenomenon in $\boldsymbol R^n$. MATHEMATICA SCANDINAVICA, [S. l.], v. 88, n. 1, p. 72–78, 2001. DOI: 10.7146/math.scand.a-14314. Disponível em: https://www.mscand.dk/article/view/14314. Acesso em: 30 apr. 2024.