SJÖLIN, P. Maximal operators of Schrödinger type with a complex parameter. MATHEMATICA SCANDINAVICA, [S. l.], v. 105, n. 1, p. 121–133, 2009. DOI: 10.7146/math.scand.a-15109. Disponível em: https://www.mscand.dk/article/view/15109. Acesso em: 24 apr. 2024.