1. F o rrest J . R . & F ra n k lin R . N . 1968 J .P hys. D 1 1357-1368.
2. F ox L. & M eyers D. F . 1968 C om puting methods p. 496. O xford: C larendon Press.
3. F ran k lin R . N. 1975 12 thIn t. Conf. Phenom. Io n iz. Gases p. 53. E indhoven.
4. F ra n k lin R . N. 1976 P lasm a phenom ena in gas discharges p. 35. O xford: C larendon P ress.
5. F ried m an H . W . & Levi E . 1968 P hys. F Iu id s 11 678-680.