1. Interaction Between the Solar Wind and the Interstellar Medium
2. The heliopause
3. The Interstellar Probe: Scientific Objectives and Requirements for a Frontier Mission to the Heliospheric Boundary and Interstellar Space;Holzer,1990
4. Space Physics Strategy-Implementation Study;The NASA Space Physics Program for 1995 to 2010,1991
5. Small Instruments for Space Physics,1993