Dunaevskii A.M. , Chilingaryan A.A. , Galfayan S.K. , Zazyan M.Z. Multidimensional analysis of data obtained in experiments with X-ray emulsion chambers and extensive air showers. II-19331 19th Intern.cosmic ray conf. La Jolla, USA, Aug.11-23, 1985.Conf.papers , Vol.6 , с. P.392-395 , 01.1985