C. Fermüller, Ch Roschger:
"Bridges between Contextual Linguistic Models of Vagueness and T-Norm Based Fuzzy Logic";
in: "Proceedings of the 8th Workshop on Uncertainty Processing", T. Kroupa, J. Vejnarova (ed.); issued by: European Science Foundation; Universtiy of Economics, Prague, 2009, ISBN: 978-80-245-1543-4, 71 - 79.