Silva, J., P. . Monteiro, R. Fernandes, J. Malheiro, C. Silva, P. . Ferreira, A. Seixas, and V. Paixão Dias. “Nailfold Capillaroscopy in the Evaluation of Autoimmune Diseases”. Internal Medicine, vol. 24, no. 4, Dec. 2017, pp. 285-9, doi:10.24950/rspmi/O37/17/2017.