Alaburda, Janete, et al. “Sulfonamides in Milk by High Performance Liquid Chromatography With Pre-Column Derivatization and Fluorescence Detection”. Pesquisa Agropecuaria Brasileira, vol. 42, no. 11, Nov. 2007, pp. 1587-92, doi:10.1590/S1678-3921.pab2007.v42.7736.