Sasse, Astrid; Kiec-Kononowicz, Katarzyna; Stark, Holger; Motyl, Malgorzata; Reidemeister, Sibylle; Ganellin, C. Robin; Ligneau, Xavier; Schwartz, Jean-Charles; Schunack, Walter Journal of Medicinal Chemistry, 1999 , vol. 42, # 4 p. 593 - 600