X-RAY ABSORPTION OF NITROGEN-DOPED AMORPHOUS CARBON FILMS FOR DETERMINING SP<SUP>2</SUP>/SP<SUP>3</SUP> BONDING CONCENTRATIONS Статья Hamilton T., Foursa M., Hirose A., Moewes A. Radiation Physics and Chemistry. Elsevier Science Publishing Company, Inc.. Том 75. 2006. С. 1613-1616