ARNARSON, T.; ERIKSSON, J. On the size of the non-coincidence set of parabolic obstacle problems with applications to American option pricing. MATHEMATICA SCANDINAVICA, [S. l.], v. 101, n. 1, p. 148–160, 2007. DOI: 10.7146/math.scand.a-15036. Disponível em: https://www.mscand.dk/article/view/15036. Acesso em: 2 may. 2024.