1. Comments on Alfven Waves and Plasma Drift in a Slightly Ionized Gas, Hideyuki Kamaya and Ryoichi Nishi, The Astrophysical Journal, Vol. 500, (1998) 257 -- 261. 2. Back Reaction to the Spectrum of Magnetic Field in the Kinetic Dynamo Theory, Tetsuya Shiromizu and Ryoichi Nishi, Progress of Theoretical Physics, Vol 101, (1999) 39 -- 45. 3. On the Decelerating Shock Instability of Plane-Parallel Slab with Finite Thickness, Ryoichi Nishi and Kideyuki Kamaya, The Astrophysical Journal, Vol. 532, (2000) 1172 -- 1180. 4. Dynamical Instability During Plasma Drift, Hideyuki Kamaya and Ryoichi Nishi, The Astrophysical Journal, Vol. 534, (2000) 309 --316. 5. Frozen Condition for the Charged particles in Molecular Clouds, Hideyuki Kamaya and Ryoichi Nishi, The Astrophysical Journal, Vol. 543, (2000) 257 --270.