@article{articlea60ecb49,
title   = {Comparison of methodologies for determination of carboxylic and phenolic groups in humic substances},
author = {Masini, Jorge Cesar and Abate, Gilberto and Lima, E C and Hahn, L C and Nakamura, M S and Lichtig, Jaim and Nagatomy, Helio Rissei},
year = {1998},
doi = {10.1016/s0003-2670(98)00045-2},
journal   = {Analytica Chimica Acta}
}