Falling ball viscosimetry of giant vesicle membranes: Finite-size effects R. Dimova, C. Dietrich, A. Hadjiisky, K. Danov and B. Pouligny Eur. Phys. J. B, 12 4 (1999) 589-598 Published online: 15 December 1999 DOI: 10.1007/s100510051042