Dutschmann, L., Ferreira, C., De Sousa, G., Miranda, M. I., Santos, M. J., Pereira, M. J., Lourenço, M. L., Soares-Costa, J. T., & Sarmento, J. L. (1989). Cardiac manifestations of connective tissue diseases. Acta Médica Portuguesa, 2(2), 103–10. https://doi.org/10.20344/amp.3459