M\’ endez, J. and Toscano, J. (2004) “A nonlinear $R_\xi$--gauge for the electroweak theory”, Revista Mexicana de Física, 50(4), pp. 346–0. Available at: https://rmf.smf.mx/ojs/index.php/rmf/article/view/3265 (Accessed: 4 July 2024).