Precision mass measurements of 40Ca17+ and 40Ca19+ ions in a Penning trapSz. Nagy, T. Fritioff, A. Solders, R. Schuch, M. Björkhage and I. BergströmEur. Phys. J. D, 39 1 (2006) 1-4DOI: https://doi.org/10.1140/epjd/e2006-00064-8