BENCHEVA, V.; MILOUSHEVA, V. Fundamental Theorems for Timelike Surfaces in the Minkowski 4-Space. Proceedings of the Bulgarian Academy of Sciences, Sofia, Bulgaria, v. 77, n. 2, p. 167–178, 2024. DOI: 10.7546/CRABS.2024.02.01. Disponível em: https://www.proceedings.bas.bg/index.php/cr/article/view/474. Acesso em: 22 jul. 2026.