Vaz, Luis Geraldo et al. Niobium influence in the mechanical properties of experimental copper based metallic alloys. Journal of Dental Research. Alexandria: Int Amer Associação Dental Researchi A D R/a A D R, v. 80, n. 4, p. 1107-1107, 2001. Disponible en: <http://hdl.handle.net/11449/16393>.