References
1. Larry K. Warne, Roy E. Jorgenson, and Scott D. Nicolaysen, Ionization Coefficient Approach to Modeling Breakdown in Nonuniform Geometries, Sandia Report (2003).
2. J. Dutton, A survey of Electron Swarm Data, J. Phys. Chem. Ref. Data, Vol 4, No 3, 1975.
3. J.M. Meek, J.D. Craggs, Electrical Breakdown of Gases (1953).