Статья 2335 N.H. Hakobyan V.M. Aroutiounian H.L. Margaryan V.K. Abrahamyan N.V. Kamanina D.L. Hovhannisyan D.K. Pokhsraryan Journal of Contemporary Physics (Armenian Academy of Sciences) v.44, № 6 p.283-290 2009 http://www.springer.com/physics/particle+and+nuclear+physics/journal/11958