THOMPSON, J. On the Total Regularity of Function-to-Function Transformations of Triangular Type. MATHEMATICA SCANDINAVICA, [S. l.], v. 18, p. 19–22, 1966. DOI: 10.7146/math.scand.a-10775. Disponível em: https://www.mscand.dk/article/view/10775. Acesso em: 7 may. 2024.