MUCH, A. Massless QFT and the Newton-Wigner Operator. Revista de la Escuela de Física, [S. l.], v. 6, n. 1, p. 43–63, 2018. DOI: 10.5377/ref.v6i1.7028. Disponível em: https://camjol.info/index.php/fisica/article/view/7028. Acesso em: 19 oct. 2024.