Kalantzi, L. Goumas, K. Kalioras, V. Abrahamsson, B. Dressman, J.B. Reppas, C., Characterization of the human upper gastrointestinal contents under conditions simulating bioavailability/bioequivalence studies, Pharmaceutical Research, (23), 165-176, 2006, 0724-8741, 1573-904X