Topology of the Heliospheric Current Sheet at the Time of the Halley's Comet-Giotto Encounter Suess, S. T. ; O'Farrell, J. M. ; Hoeksema, J. T. ; Scherrer, P. H. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: March 1986 Bibcode: 1986BAAS...18..678S