Czaja, K., and M. Białek. “Studies of the Microstructure of Ethylene 1-Hexene Copolymers Prepared over Heterogeneous Ziegler-Natta Catalysts”. Polimery, vol. 45, no. 5, Sept. 2022, pp. 353-7, doi:10.14314/polimery.2000.353.