By Chapkanov A.   in Spectroscopy Letters

ISSN:0038-7010|43|2|79-83

Taylor & Francis Ltd‎(2010)‎

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By Ivanova B.   Chapkanov A.   Arnaudov M.   Petkov I.   in Structural Chemistry

ISSN:1040-0400|16|1|47-53

Springer Publishing Company ‎(2005)‎

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By Gdalevich G.   Izhovkina N.   Ozerov V.   Bankov N.   Chapkanov S.   Todorieva L.   in Cosmic Research

ISSN:0010-9525|44|5|419-424

MAIK Nauka/Interperiodica‎(2006)‎

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