Barker, F. G. II (1995). "Phineas among the phrenologists: the American crowbar case and nineteenth-century theories of cerebral localization" (PDF). Journal of Neurosurgery 82 (4): 672–82. doi:10.3171/jns.1995.82.4.0672. PMID 7897537.
Barker, F. G. II (1995). "Phineas among the phrenologists: the American crowbar case and nineteenth-century theories of cerebral localization" (PDF). Journal of Neurosurgery 82 (4): 672–82. doi:10.3171/jns.1995.82.4.0672. PMID 7897537.