Almeida, Rita, Pinto Viana, Joaquim Monteiro, Cristina Gonçalves, and Carlos Calado. 1996. “Metastatic Spinal Cord Tumors - Review of Hospitol-Based Population”. Internal Medicine 3 (4). Lisboa, Portugal:212-15. https://revista.spmi.pt/index.php/rpmi/article/view/2300.