Botas, L., Freitas, J. P., Barroca, J. P., Laginha, T. and Martins e Silva, J. (1983) “Peripheral tissue oxygenation in patients with congestive heart failure”., Acta Médica Portuguesa. Lisbon, Portugal, 4(1), pp. 7–10. doi: 10.20344/amp.4151.