WAHLBERG, P. Propagation of polynomial phase space singularities for Schrödinger equations with quadratic Hamiltonians. MATHEMATICA SCANDINAVICA, [S. l.], v. 122, n. 1, p. 107–140, 2018. DOI: 10.7146/math.scand.a-97187. Disponível em: https://www.mscand.dk/article/view/97187. Acesso em: 19 apr. 2024.