1. Prospects for the Voyager extraplanetary and interstellar mission;Cesarone;J. British Interplanetary Soc.,1984
2. Results from a poll taken at the New Hampshire Symposium on the Outer Heliosphere, May (1989)
3. Long-term solar wind electron variations between 1971 and 1978;Feldman;J. Geophys. Res.,1979
4. An interplanetary view of coronal holes;Hundhausen,1977
5. Spatial variation and evolution of heliospheric sector structure;Behannon;J. Geophys. Res.,1989