Помогите, пожалуйста, с этими 3 статьями:
1.
Journal of Catalysis
Volume 13, Issue 1, January 1969, Pages 58-64
Brönsted and Lewis acid site concentrations in fluorided alumina from the infrared spectra of adsorbed pyridine species
Thomas R. Hughes, Harry M. White and Robert J. White
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http://dx.doi.org/10.1016/0021-9517(69)90370-4Journal of Catalysis
Volume 54, Issue 3, 13 October 1978, Pages 348-364
Infrared study of the adsorption of pyridine on α-Al2O3
Claudio Morterra, Salvatore Coluccia, Anna Chiorino and Flora Boccuzzi
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http://dx.doi.org/10.1016/0021-9517(78)90083-0Journal of Catalysis
Volume 54, Issue 3, 13 October 1978, Pages 303-317
A study of pyridine adsorbed on silica-alumina catalysts by combined infrared spectroscopy and temperature-programmed desorption
J. A. Schwarz, B. G. Russell and H. F. Harnsberger
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http://dx.doi.org/10.1016/0021-9517(78)90079-9