Nesterova N.M. , Yakovlev V.I. , Kirov I.N. , Stamenov J.N. , Chubenko A.P. , Dubovij A.G. , Petrov S.P. Phenomenological shower characteristics from the Crab nebula direction. I-93843 Intern. cosmic ray conf. Aug. 2-15, 1987. Moscow, USSR. Conf.Papers. , Vol.1 , с. P.279-281 , 01.1987 Nikolsky S.I. , Stamenov J.N. , Karakula S.. , Tkaczyk W.. Cosmic ray energy spectrum and mass composition from point sources. 21-th Intern. cosmic ray conf. Conf.papers. Australia. , Vol.3 , с. P.169-172 , 01.1990 Nikolsky S.I. , Aseikin V.S. , Kirov I.N. , Nikolskaja N.M. , Stamenov J.N. , Ushev S.Z. Search of EAS excess from the direction of compact gelactic x-ray sources Gugnus X-1 and others. J.Phys. , Vol.18G,N12 , с. P.2027-2035 , 01.1992