Schnitzler, E.; Lazzarotto, M.; Carvalho-Filho, M. A. da S.; Ionashiro, M. Thermoanalytical Study of the Complexes of 4-Dimethylaminocynnamylidenepyruvate With Manganese (II), Cobalt (II), Nickel (II), Copper (II), Zinc (II) and Lead (II), in the Solid State. Eclet. Quim. 2002, 27, 41-50.