Ngome, M. T., J. G. L. F. Alves, R. H. Piccoli, E. de C. Domingo, S. A. Pinto, e O. L. M. Bernal. “<b>Inoculum Concentration and Inoculation Time for Propionic Acid Production from Whey Using Mixed Culture of <i>Lactobacillus helveticus</i> and <i>Propionibacterium freudenreichii</I> PS-1”. Acta Scientiarum. Technology, vol. 39, nº 5, dezembro de 2017, p. 543-50, doi:10.4025/actascitechnol.v39i5.29479.