Nogueira, T., M. Semedo, and E. Cunha. “Essential Heavy Metals in Renal Tumor Tissue and Its Possible Relation to Carcinogenesis: Applying the Scanning Electron Microscopy Coupled With X-Ray Microanalysis Technique”. International Journal of Medical Students, vol. 3, no. 1, Feb. 2015, pp. 10-14, doi:10.5195/ijms.2015.107.