VUJAČIĆ, V. HYPERBOLIC GEOMETRY IN KLEIN’S MODEL. NIR, [S. l.], v. 1, n. 6, p. 41, 2014. DOI: 10.59417/nir.2014.6.41. Disponível em: http://nir-casopis.org/index.php/nir/article/view/218. Acesso em: 10 mar. 2025.