Shazia Perveen and Iftikhar Imam Naqvi , Trans., “Inclusion Complexation of Benzyl Viologen by β-Cyclodextrin in DMF-H2O Mixed Solution”, Pak. J. Anal. Environ. Chem., vol. 17, no. 1, pp. 58 – 64, Jan. 2016, doi: 10.21743/pjaec/2016.06.009.