@article{articleafd59796,
title   = {A computacional study of substituted flavylium salts and their quinonoidal conjugate-bases: S0->S1 electronic transition, absolute pKa and reduction potential calculations by DFT and semiempirical methods},
author = {Freitas, Adilson A. and Shimizu, K. and Dias, Luís Gustavo and Quina, Frank Herbert},
year = {2007},
doi = {10.1590/s0103-50532007000800014},
journal   = {Journal of the Brazilian Chemical Society}
}