(Semi-)Nonrelativisitic Limit of the Nonlinear Dirac Equations. Journal of Mathematical Study, [S. l.], v. 53, n. 2, p. 125–142, 2020. DOI: 10.4208/jms.v53n2.20.01. Disponível em: https://global-sci.com/index.php/jms/article/view/13367. Acesso em: 6 dec. 2025.