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Помогите, пожалуйста, найти статьи:
1. The operational nature of acidic functional group analyses and its impact on mathematical descriptions of acid-base equilibria in humic substances
E.M. Perdue, J.H. Reuter and M. Ghosal
Geochimica et Cosmochimica Acta, Volume 44, Issue 11, November 1980, Pages 1841-1851

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http://dx.doi.org/10.1016/0016-7037(80)90233-1

2. A statistical model of proton binding by humus. E.M. Perdue, J.H. Reuter and R.S. Parrish
Geochimica et Cosmochimica Acta. Volume 48, Issue 6, June 1984, Pages 1257-1263

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http://dx.doi.org/10.1016/0016-7037(84)90060-7

3. Proton-binding study of standard and reference fulvic acids, humic acids, and natural organic matter. Jason D. Ritchie and E. Michael Perdue
Geochimica et Cosmochimica Acta. Volume 67, Issue 1, 1 January 2003, Pages 85-96

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http://dx.doi.org/10.1016/S0016-7037(02)01044-X

4. Monitoring the properties of natural organic matter through UV spectroscopy: A consistent theory. G. V. Korshin, Chi-Wang Li and M. M. Benjamin
Water Research. Volume 31, Issue 7, July 1997, Pages 1787-1795

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http://dx.doi.org/10.1016/S0043-1354(97)00006-7

5. Molecular size distribution and spectroscopic properties of aquatic humic substances. Juhani Peuravuori, and Kalevi Pihlaja
Analytica Chimica Acta. Volume 337, Issue 2, 20 January 1997, Pages 133-149

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http://dx.doi.org/10.1016/S0003-2670(96)00412-6

6. Separation methods in the chemistry of humic substances. Pavel Jano
Journal of Chromatography A. Volume 983, Issues 1-2, 3 January 2003, Pages 1-18

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http://dx.doi.org/10.1016/S0021-9673(02)01687-4

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