1. Current collection by two spherical probes at high potential in a low density plasma;Boyd;EOS,1987
2. Multi-level adaptive solutions to boundary-value problems;Brandt;Math. Comp.,1977
3. Plasma Diagnostic Techniques;Chen,1965
4. Introduction to Plasma Physics and Controlled Fusion;Chen,1984
5. Ionization induced instability in an electron collecting sheath;Cooke;J. Spacecraft Rockets,1988