SJÖGREN, P.; SJÖLIN, P. Local regularity of solutions to time-dependent Schrödinger equations with smooth potentials. Annales Fennici Mathematici, [S. l.], v. 16, n. 1, p. 3–12, 1991. DOI: 10.5186/aasfm.1991.1624. Disponível em: https://afm.journal.fi/article/view/134700. Acesso em: 25 nov. 2024.