J. Ceballos-Medina, S. Moreno-Jiménez, and M. Ángel Celis-López, “Application of the Barrow pain scale at neurosurgical treatment with Novalis linear accelerator for trigeminal neuralgia, the National Institute of Neurology and Neurosurgery”, Arch Neurocien, vol. 19, no. 1, pp. 24–33, Mar. 2014.