WU, Z.; ZHOU, M.; WANG, X. Interactive Modeling of 3D Tree with Ball B-Spline Curves. International Journal of Virtual Reality, [S. l.], v. 8, n. 2, p. 101–107, 2009. DOI: 10.20870/IJVR.2009.8.2.2731. Disponível em: https://ijvr.eu/article/view/2731. Acesso em: 6 feb. 2023.