SJÖLIN, Per; STRÖMBERG, Jan-Olov. Analysis of Schrödinger means. Annales Fennici Mathematici, [S. l.], v. 46, n. 1, p. 389–394, 2021. Disponível em: https://afm.journal.fi/article/view/109592. Acesso em: 8 dec. 2025.