1. Phenomenon of the anomalous delay of hadronic and electronic components of EAS
2. C.J. Hatton, The neutron monitor. Progress in Elementary Particle and Cosmic Rays Physics, vol. X, North-Holland, Amsterdam, 1971
3. B.K. Chattejee, et al., Proceedings of the 8th ICRC, vol. 4, 1963, pp. 143–167