Статья 1662 R. B. Alaverdyan A. L. Aslanyan L. S. Aslanyan G. S. Gevorgyan S. Ts. Nersisyan Journal of Contemporary Physics (Armenian Academy of Sciences) Vol. 50, No. 2 137-143 2015 http://www.springer.com/physics/particle+and+nuclear+physics/journal/11958