FUSHCHICH, V. I.; LAGNO, V. I.; ZHDANOV, R. Z. Reduction of the self-dual Yang-Mills equations I. Poincaré group. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 47, n. 4, p. 456–462, 1995. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5442. Acesso em: 5 dec. 2025.