Citation: E. Ivanova et al., DETERMINATION OF COPPER, MANGANESE AND NICKEL IN BIOLOGICAL SAMPLES AND SEA-WATER BY FLOW-INJECTION ONLINE SORPTION PRECONCENTRATION IN A KNOTTED REACTOR COUPLED WITH ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY, Journal of analytical atomic spectrometry (Print), 13(6), 1998, pp. 527-531