J. Valdiero, R. da Cunha, and L. Brito-Gitirana, “Replacement of the background stain in the Taenzer-Unna acid Orcein method: contemporary perspective on research and histopathological diagnosis”, Acta Sci Anat, vol. 1, no. 2, pp. 131–135, Jan. 2019, doi: 10.65053/asa20190107.