Հոդված 2279 H.L. Margaryan N.H. Hakobyan D.L. Hovhannisyan V.K. Abrahamyan T.K. Sargsyan A.M. Movsisyan SID Symposium Digest of Technical Papers Volume 44, Issue 92–93 2013 http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2168-0159