Chirinos, Juan, Minerva Hidalgo, Tamara Rajmankina, y Alvaro Parada. 1. «The Effect of Electron Donors in Ziegler-Natta Catalysts Supported on Recrystallized MgC12». Rev. Téc. Fac. Ing. Univ. Zulia 20 (3). https://mail.produccioncientificaluz.org/index.php/tecnica/article/view/5546.