Castro, Álvaro, Edgar Espejo, and Leonardo Martínez. 2000. “Study on the Types of Craters Produced in the Impact of Projectiles 5,56 SS109, over Steel Targets AISI-SAE 1045”. Revista De Metalurgia 36 (1):24-32. https://doi.org/10.3989/revmetalm.2000.v36.i1.553.