Jeon, Sunghwan, et al. “Synthesis, Spectroscopic Properties and Hirshfeld Surface Analysis of 3,14-Dimethyl-2,6,13,17-tetraazoniatricyclo(16.4.0.07,12)docosane Tetrachloride Tetrahydrate”. Asian Journal of Chemistry, vol. 33, no. 8, July 2021, pp. 1861-7, doi:10.14233/ajchem.2021.23258.