Jinfeng Zhao, Peng Song & Fengcai Ma. (1970). A DFT/TDDFT Investigation of Excited-State Intramolecular Proton Transfer Mechanism of New Chromophore.
            <i>Communications in Computational Chemistry</i>. <i>2</i> (4).
            146-157.
         doi:10.4208/cicc.2014.v2.n4.3