Nesterova N.M. ,     Romakhin V.A. ,     Aseikin V.S. ,     Nikolskaja N.M. ,     Stamenov J.N. ,     Janminchev V.D. ,     Kabanova N.V. ,     Benko D.. ,     Stanev T.S. Electron and muon number spectra of extensive air showers at 3340 m a.s.l.. II-17605 12th Intern. Conf. on Cosmic Rays. Hobart. August 16-25,1971. Conf.papers ... , Vol.6 , с. P.2152-2159 , 01.1971   Nesterova N.M. ,     Romakhin V.A. ,     Kirov I.N. ,     Stamenov J.N. ,     Ushev S.Z. ,     Kabanova N.V. ,     Yanminchev V.D. ,     Stanev T.S. ,     Betev B.. ,     Markovsky B.. ,     Vankov H.. Investigation of EAS fluctuations of the muon component of extensive air showers at mountain altitudes. 14-th Intern. Cosmic Ray Conf. Proc. Munich 1975 , Vol.8 , с. (3 печ. л.) , 01.1975   Nesterova N.M. ,     Romakhin V.A. ,     Stanev T.S. ,     Betev B.. ,     Vankov H.. Fluctuations of the electromagnetic component of the EAS in the central region. 14-th Intern. Cosmic Ray Conf. Proc. Munich 1975 , Vol.8 , с. (7 печ.л.) , 01.1975   Nesterova N.M. ,     Nikolsky S.I. ,     Romakhin V.A. ,     Kirov I.N. ,     Stamenov J.N. ,     Ushev S.Z. ,     Kabanova N.V. ,     Yanminchev V.D. ,     Stanev T.S. ,     Betev B.. ,     Vankov H.. ,     Katzarsky L.. The fluctuation of muon density of EAS at different distances form axis. 15-th Intern. Cosmic Ray Conf. Bulgaria.1977 , Vol.8 , с. (6 печ.л.) , 01.1977