Chirinos, Juan, Minerva Hidalgo, Tamara Rajmankina, and Alvaro Parada. “The Effect of Electron Donors in Ziegler-Natta Catalysts Supported on Recrystallized MgC12”. Rev. Téc. Fac. Ing. Univ. Zulia 20, no. 3 (1). Accessed August 2, 2025. https://produccioncientifica.luz.edu.ve/index.php/tecnica/article/view/5546.