Lafarge, Thomas, Beatriz Pateiro-López, Antonio Possolo, and Joy Dunkers. “R Implementation of a Polyhedral Approximation to a 3D Set of Points Using the α-Shape”. Journal of Statistical Software 56, no. 4 (January 25, 2014): 1–19. Accessed April 28, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v056i04.