BENZAHRA-BELKACEM, Fatima Zahra; SIDHOUMI, Noura. Biharmonic Helices in Three-Dimensional Lorentzian Egorov and $\varepsilon$-Spaces. Armenian Journal of Mathematics, Yerevan, Armenia, v. 18, n. 1, p. 1–17, 2026. DOI: 10.52737/18291163-2026.18.1-1-17. Disponível em: https://armjmath.sci.am/index.php/ajm/article/view/1579. Acesso em: 26 mar. 2026.