Melios, C.B., Delsin, A.M., Tognolli, J.O. and Molina, M. 1981. Protonation constants of p-substituted benzylidenepyruvic acids. Eclética Química. 6, 1 (Dec. 1981), 51–54. DOI:https://doi.org/10.26850/1678-4618eqj.v6.1.1981.p51-54.