Rubinstein, LJ., & Brucher, J.-M. (1980). Evidence From the Immunoperoxidase Technique of Focal Glial (ependymal) Differentiation in Choroid-plexus Papillomas. Journal of Neuropathology and Experimental Neurology, 39(3), 387. https://doi.org/10.1097/00005072-198005000-00157 (Original work published 1980)