Revaprasadu, N. et al. 2015. Green Synthesis and Antiviral Activity of Novel Triarylmethane Derivatives via Friedel-Crafts Alkylation by Polyethylene Glycol (PEG-400). Asian Journal of Chemistry. 28, 3 (Dec. 2015), 473–478. DOI:https://doi.org/10.14233/ajchem.2016.19122.