Direct mass measurements of A=80 isobars S. Issmer, M. Fruneau, J.A. Pinston, M. Asghar, D. Barnéoud, J. Genevey, Th. Kerscher and K.E.G. LöbnerEur. Phys. J. A, 2 2 (1998) 173-177DOI: https://doi.org/10.1007/s100500050106