"Cerebral vasodilator nerves and their pathway from the medulla oblongata, with observations on the pial and intracerebral vascular plexus," Archives of Neurology and Psychiatry, 28: 1257-1289 / Wilder Graves Penfield and J. Chorobski
"The principles of physiology involved in the management of increased intracranial pressure," Annals of Surgery, 102 (4): 548-554 / Wilder Graves Penfield