Alcota-Rojas, M., Compán-Catenacci, G., Salinas-Castro, J. C. and Palma-Eyzaguirre, A. M. (2011) “Comparative in vitro study of root canal transportation, using three nickel-titanium rotary systems: hero shaper, protaper universal”, Revista Facultad de Odontología Universidad de Antioquia, 23(1), pp. 9–21. doi: 10.17533/udea.rfo.8111.