Marinho, Paulo Vinícius Tertuliano, et al. “Surgical Treatment of Lumbar Extradural Chondroma in a Dog - Case Report”. Semina: Ciências Agrárias, vol. 34, no. 4, Aug. 2013, pp. 1835-40, doi:10.5433/1679-0359.2013v34n4p1835.