Max P. McDaniel "A Review of the Phillips Supported Chromium Catalyst and Its Commercial Use for Ethylene Polymerization" Advances in Catalysis, 2010, Volume 53, p. 123. doi:10.1016/S0360-0564(10)53003-7
Klaus H. Theopold "Deprotonation of coordinated ethylene may start Phillips catalysis" Proceedings, U.S. National Academy of Sciences, 2014, vol. 111, pp. 11578–11579, doi:10.1073/pnas.1411822111
