Pires, A. F., T. M. Mendes, A. A. Reis, A. F. Pacheco, V. Fagundes, and M. Mesquita. “A Symptomatic Pneumocephalus As a Complication of Lumbar Epidural Anaesthesia”. European Journal of Case Reports in Internal Medicine, vol. 7, no. 2, Jan. 2020, doi:10.12890/2020_001425.