Characterization of the roundness degree of graphite nodules in ductile iron: A new discrete measure independent to resolution. Superficies y Vacio [Internet]. 2013 Jun. 15 [cited 2025 Dec. 16];26(2):58-63. Available from: https://www.superficiesyvacio.smctsm.org.mx/index.php/SyV/article/view/170