Vijayakumar, P., et al. “Fluorescence Recognition of Al(III) Ions by a New Chemosensor Based E-4-((1-(10H-Phenothiazin-2-yl)ethylidene)amino)-N-(pyrimindin-2-yl)benzenesulfonamide”. Asian Journal of Chemistry, vol. 33, no. 7, June 2021, pp. 1563-72, doi:10.14233/ajchem.2021.23217.