Rugai, E. and Teixeira Rugai, R. (1964) “Culture medium for differentiation of Proteus and Providencia groups from other enterobacteria by the l-tryptophan desaminase”, Instituto Adolfo Lutz Journal - RIAL, 24(1-2), pp. 29–32. doi: 10.53393/rial.1964.24.33419.