MÜLLER, S.; STRUWE, M. Spatially discrete wave maps on $(1 + 2)$-dimensional space-time. Topological Methods in Nonlinear Analysis, [S. l.], v. 11, n. 2, p. 295–320, 1998. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1998.020. Acesso em: 22 jul. 2024.