Axford, W. I. MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;
Axford, W. I., & Sagdeev, R. Z. (1987). The encounters with comet Halley, March 1986. In A. L. Cullen (Ed.), Modern Radio Science (Series of Tutorial and General Lectures at 22th URSI General Assembly, Tel Aviv, 24 August-02 September 1987) (pp. 155-164). Paris: ICSU Press.