Espín, L., Quispe-Alcocer, J., Espín, G., Villacís-Sandoval, J. and Castro-Viteri, J. 2016. Extraosseous Ewing’s Sarcoma in Spinal Epidural Space. International Journal of Medical and Surgical Sciences. 3, 4 (Dec. 2016), 1003–1007. DOI:https://doi.org/10.32457/ijmss.2016.036.