BRANDT, A. A Generalization of a Combinatorial Theorem of Sparre Andersen About Sums of Random Variables. MATHEMATICA SCANDINAVICA, [S. l.], v. 9, p. 352–358, 1961. DOI: 10.7146/math.scand.a-10640. Disponível em: https://www.mscand.dk/article/view/10640. Acesso em: 27 apr. 2024.