Solid State Commun. , 01.1989    Включает:   Golovashkin A.I. ,     Krasnosvobodtcev S.I. ,     Pechen E.V. ,     Kraiskaya K.V. ,     Boldyrev N.Y. ,     Burlakov V.M. ,     Khadzhiiskii Y.A. ,     Lerner I.V. ,     Mit'ko A.G. ,     Zhizhin G.N. Spectroscopy of energy gap in ceramics and oriented films of YBa_2Cu_3O_7 in the regime of negative light fluxes , 01.1989 Copyright © БЕН РАН.