Malignant Bile-Duct Obstruction: Experience with Self-Expanding Metal Endoprostheses (Wallstents) in Austria - Schöfl, R; Brownstone, E; Reichel, W; Fortunat, W; Doblhofer, F; Samec, H J; Brandstätter, G; Stupnicki, T; Pamperl, H; Schreiber, P; Gangl, A (Endoscopy, 1994)