Klyamkina, A. N., et al. “Some Aspects of Propylene and Ethylene Copolymenzation over Titanium-Magnesium and Metallocene Catalysts”. Polimery, vol. 46, no. 6, Sept. 2022, pp. 402-5, https://polimery.ichp.vot.pl/index.php/p/article/view/2089.