Помогите пожалуйста со следующими статьями:
1) Journal of Chromatography A, 1987
Volume 396, Pages 225-236
T. Näsholm, G. Sandberg and A. Ericsson
Quantitative analysis of amino acids in conifer tissues by high-performance liquid chromatography and fluorescence detection of their 9-fluorenylmethyl chloroformate derivatives
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http://dx.doi.org/10.1016/S0021-9673(01)94060-9Volume 507, Pages 67-77
Barbro Gustavsson and Ingvar Betnér
Fully automated amino acid analysis for protein and peptide hydrolysates by precolumn derivatization with 9-fluorenyl methylchloroformate and 1-aminoadamantane
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http://dx.doi.org/10.1016/S0021-9673(01)84182-0Volume 514, Pages 227-239
Marcia F. Malmer and Lauren Alfred Schroeder
Amino acid anslysis by high-performance liquid chromatography with methanesulfonic acid hydrolysis and 9-fluorenylmethylchloroformate derivatization
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http://dx.doi.org/10.1016/S0021-9673(01)89394-8