Filler AG, Haynes J, Jordan SE, và đồng nghiệp (tháng 2 năm 2005). “Sciatica of nondisc origin and piriformis syndrome: diagnosis by magnetic resonance neurography and interventional magnetic resonance imaging with outcome study of resulting treatment”. Journal of Neurosurgery. Spine. 2 (2): 99–115. doi:10.3171/spi.2005.2.2.0099. PMID15739520.
Filler AG, Haynes J, Jordan SE, và đồng nghiệp (tháng 2 năm 2005). “Sciatica of nondisc origin and piriformis syndrome: diagnosis by magnetic resonance neurography and interventional magnetic resonance imaging with outcome study of resulting treatment”. Journal of Neurosurgery. Spine. 2 (2): 99–115. doi:10.3171/spi.2005.2.2.0099. PMID15739520.