1. Thermal positive ions in the outer ionosphere and mangetosphere from OGO 1;Ahmed;J. Geophys. Res.,1972
2. Computer simulation of a spherical Langmuir probe;Albers,1973
3. The collection of positive ions by a probe immersed in a plasma;Allen;Proc. Phys. Soc. London, Sect. B,1957
4. Wave-like phenomena in the near-earth plasma and interactions with man-made bodies;Al'pert,1976
5. ATpert, J. L., , A. V., Gurevich, , L. P., Pitaevskii, , Space Physics With Artificial Satellites, 186-210 Consultants Bureau, New York, 1965,