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- [2] HALF-LIFE OF RB-87 MEASURED AS DIFFERENCE BETWEEN ISOTOPES RB-87 AND RB-85 ZEITSCHRIFT FUR PHYSIK, 1974, 270 (02): : 121 - 127
- [3] REDETERMINATION OF HALF-LIFE OF RB-87 BY COMPARISON OF SEPARATED ISOTOPES RB-85 AND RB-87 ZEITSCHRIFT FUR NATURFORSCHUNG PART A-ASTROPHYSIK PHYSIK UND PHYSIKALISCHE CHEMIE, 1972, A-27 (05): : 862 - &