GILL, J. Enhancing the convergence region of a sequence of bilinear transformations. MATHEMATICA SCANDINAVICA, [S. l.], v. 43, p. 74–80, 1978. DOI: 10.7146/math.scand.a-11765. Disponível em: https://www.mscand.dk/article/view/11765. Acesso em: 4 may. 2024.