Bergman، Ronald A.؛ Afifi، Adel K.؛ Miyauchi، Ryosuke (2005). "Circle of Willis". Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System: Arteries: Head, Neck, and Thorax. مؤرشف من الأصل في 2021-05-03.
Uston، Cagatay (9 مارس 2005). "NEUROwords Dr. Thomas Willis' Famous Eponym: The Circle of Willis". Journal of the History of the Neurosciences. ج. 14 ع. 1: 16–21. DOI:10.1080/096470490512553. PMID:15804755. S2CID:146301989.
Uston، Cagatay (9 مارس 2005). "NEUROwords Dr. Thomas Willis' Famous Eponym: The Circle of Willis". Journal of the History of the Neurosciences. ج. 14 ع. 1: 16–21. DOI:10.1080/096470490512553. PMID:15804755. S2CID:146301989.
Uston، Cagatay (9 مارس 2005). "NEUROwords Dr. Thomas Willis' Famous Eponym: The Circle of Willis". Journal of the History of the Neurosciences. ج. 14 ع. 1: 16–21. DOI:10.1080/096470490512553. PMID:15804755. S2CID:146301989.
Boorder، Michiel J.؛ Grond، Jeroen؛ Dongen، Alice J.؛ Klijn، Catharina J.M.؛ Jaap Kappelle، L.؛ Rijk، Peter P.؛ Hendrikse، Jeroen (24 أكتوبر 2006). "Spect measurements of regional cerebral perfusion and carbondioxide reactivity: Correlation with cerebral collaterals in internal carotid artery occlusive disease". Journal of Neurology. ج. 253 ع. 10: 1285–1291. DOI:10.1007/s00415-006-0192-1. PMID:17063318. S2CID:22591168.
sinauer.com
Purves, Dale؛ George J. Augustine؛ David Fitzpatrick؛ William C. Hall؛ Anthony-Samuel LaMantia؛ James O. McNamara؛ Leonard E. White (2008). Neuroscience (ط. 4th). Sinauer Associates. ص. 834–5. ISBN:978-0-87893-697-7. مؤرشف من الأصل في 2007-12-07.[بحاجة لرقم الصفحة]
Purves, Dale؛ George J. Augustine؛ David Fitzpatrick؛ William C. Hall؛ Anthony-Samuel LaMantia؛ James O. McNamara؛ Leonard E. White (2008). Neuroscience (ط. 4th). Sinauer Associates. ص. 834–5. ISBN:978-0-87893-697-7. مؤرشف من الأصل في 2007-12-07.[بحاجة لرقم الصفحة]
Bergman، Ronald A.؛ Afifi، Adel K.؛ Miyauchi، Ryosuke (2005). "Circle of Willis". Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System: Arteries: Head, Neck, and Thorax. مؤرشف من الأصل في 2021-05-03.