SENOUSSI, Bendehiba; BEKKAR, Mohammed. Helicoidal surfaces with Δ ᴶ ᵣ = Ar in 3-dimensional Euclidean space. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 60, n. 3, p. 437–448, 2015. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/5796. Acesso em: 19 apr. 2025.