Costa, V., A. Neiva, and E. Pereira-Filho. “Chromium Speciation in Leather Samples: An Experiment Using Digital Images, Mobile Phone and Environmental Concepts”. Eclética Química, vol. 44, no. 1, Jan. 2019, pp. 62-74, doi:10.26850/1678-4618eqj.v44.1.2019.p62-74.