Grassmann, Sven; Apelt, Joachim; Ligneau, Xavier; Pertz, Heinz H.; Arrang, Jean-Michel; Ganellin, C. Robin; Schwartz, Jean-Charles; Schunack, Walter; Stark, Holger Archiv der Pharmazie, 2004 , vol. 337, # 10 p. 533 - 545