1. Wave Motions of Small Amplitude in a Fully Ionized Plasma without External Magnetic Field
2. S. I. Pai, “The wave motions of small amplitude in a fully ionized plasma, Part II, with longitudinal applied magnetic field,” Tech. Note BN-207, Institute for Fluid Dynamics and Applied Mathematics, University of Maryland (1960).
3. S. I. Pai, “The wave motions of small amplitude in a fully ionized plasma, Part III, with transverse applied magnetic field,” Tech. Note BN-235, Institute for Fluid Dynamics and Applied Mathematics, University of Maryland (1961).
4. Dispersion Relations in a Stationary Plasma
5. H. C. van der Hulst, “Problems of cosmic aerodynamics,” Central Air Document Office 45 (1951).