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FILIP, M. .; PRODAN, D. .; MOLDOVAN, M. .; VLASSA, M. . DETERMINATION OF NITRATE AND NITRITE CONTENT IN ZONAR MILK SERUM AND DERIVED DAIRY DRINKS USING ION-PAIR REVERSED-PHASE HIGH PERFORMANCE LIQUID CHROMATOGRAPHY. Studia UBB Chemia 2019, 64, 197-206.