In Vitro Modelling of Tissue using Isolated Vascular Cells on a Synthetic Collagen Matrix as a Substitute for Heart Valves - Rothenburger, M; Vischer, P; Völker, W; Glasmacher, B; Berendes, E; Scheld, H H; Deiwick, M (The Thoracic and Cardiovascular Surgeon, 2001)