NICHOLS, R.; HOFMANN, S.; GESZTESY, F. Erratum: F. Gesztesy, S. Hofmann, and R. Nichols, MFAT 19 (2013), no.3, 227-259. Methods of Functional Analysis and Topology, [S. l.], v. 21, n. 1, p. 99–99, 2015. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/603. Acesso em: 16 dec. 2025.