HUNG, H. T.; HUE, L. T.; LONG, H. N. Ward-Takahashi Identity for Vertex Functions of \(\text{sQED}\). Communications in Physics, [S. l.], v. 23, n. 1, p. 11, 2013. DOI: 10.15625/0868-3166/23/1/2604. Disponível em: https://vjs.ac.vn/index.php/cip/article/view/2604. Acesso em: 20 apr. 2024.