H.Takada, N.Takahashi, and S.Kawaguchi Analysis of the arrival time of serial air showers by using Erlang Distribution and Poisson Distribution(共著). 28th International Cosmic Ray Conference, Tsukuba, Japan. 2003. 1. 211-214
S.Polityko, E.Konishi, N.Takahashi, A.Kochanov, V.Galkin, and A.Misaki Numerical results of the improved differential and integral cross sections for bremsstrahlung and pair production with the LPM effect(共著). 28th International Cosmic Ray Conference, Tsukuba, Japan. 2003. 2. 519-522