1. Carriero A, Delle Monache C, Cuonzo G et al (1990) Angiorafia a Risonanza Magnetica del circolo intracranico. Tecnica-anatomia. Radiol med. 80:588–593
2. Pernicone JR, Potchen EJ (1993) Intracranial vascular anatomy. In Potchen EJ, Haacke EM, Siebert JE et al Magnetic Resonance Angiography, St Louis, Mosby
3. Stock WK, Wetzel S, Kirsch E et al (1996) Anatomic evaluation of the circle of Willis: MR Angiography versus Intraarterial Digital Subtraction Angiography. AJNR Am J Neuroradiol 17:1495–1499
4. Katz DA, Marks MP, Napel SA et al (1995) Circle of Willis: evaluation with spiral CT angiography, MR angiography and conventional angiography. Radiology 195:445–449
5. Barboriak DP, Provenzale JM (1997) Pictorial review: magnetic resonance angiography of arterial variants at the Circle of Willis. Clin Radiol 52:429–436