1. Akashi et al., Proceedings of the 12th ICRC, Vol. 7, Hobarg, 1971, p. 2775.
2. S.G. Baiburina, A.S.Borisov, S.M.Guseeva et al., Proceedings of FIAN USSR, 1984, Vol. 154, p. 3–142.
3. I.Ya. Chasnikov, Yu.A. Eremenko, T.Kh. Sadykov, Characteristics of anomalously high multiplicity cosmic ray interactions, Proceedings of 19th ICRC, Vol. 6, Lajolla, 1985, pp. 274–277.