Accurate mass measurements of very short-lived nuclei - Prerequisites
for high-accuracy investigations of superallowed
-decays
F. Herfurth, A. Kellerbauer, F. Ames, G. Audi, D. Beck, K. Blaum, G. Bollen, O. Engels, H.-J. Kluge, D. Lunney, R.B. Moore, M. Oinonen, E. Sauvan, C. Scheidenberger, S. Schwarz, G. Sikler, C. Weber and the ISOLDE Collaboration