GÁBOS Z, MESTER Ágnes. Lines in the three-dimensional Bolyai-Lobachevskian hyperbolic geometry. Stud. Univ. Babeş-Bolyai Math. [Internet]. 2015 Dec. 30 [cited 2025 Feb. 5];60(4):583-95. Available from: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/5835