“True” Aneurysm of the Posterior Communicating Artery as a Possible Effect of Collateral Circulation in a Patient with Occlusion of the Internal Carotid Artery. A Case Study and Literature Review - Kaspera, W; Majchrzak, H; Kopera, M; Ładziński, P (min - Minimally Invasive Neurosurgery, 2002)