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- [6] NICKEL AND COBALT DETERMINATION BY CONSTANT-CURRENT POTENTIOMETRY .1. METHOD DEVELOPMENT FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY, 1993, 346 (10-11): : 952 - 956
- [7] DETERMINATION OF NICKEL AND COBALT BY CONSTANT-CURRENT POTENTIOMETRY .2. MODIFICATIONS AND CHECK OF THE METHOD FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY, 1993, 346 (10-11): : 957 - 960