Weakly adhering vesicles in shear flow: Tanktreading and anomalous lift force B. Lorz, R. Simson, J. Nardi and E. Sackmann Europhys. Lett., 51 4 (2000) 468-474 Published online: 01 September 2002 DOI: 10.1209/epl/i2000-00517-6