Caldeira, A., Casanova, P., Sousa, R., Martins, P., Banhudo, A. and Pimentel, J. (2010) “Enteric nutrition and esophageal impactation: what relationship”., Acta Médica Portuguesa. Lisbon, Portugal, 23(2), pp. 183–90. doi: 10.20344/amp.617.