Yang, Jie, et al. “Interaction of C2H4···(HX)3 (X = F, Cl, Br, I) and C6H6··&Middot;3HCl”. Asian Journal of Chemistry, vol. 26, no. 6, Mar. 2014, pp. 1604-6, doi:10.14233/ajchem.2014.17300.