%0 Journal Article %T Changes of the boot-shaped coronal hole boundary during Whole Sun Month near sunspot minimum %A Zhao, X. P. %A Hoeksema, J. T. %A Scherrer, P. H. %A , %J Journal of Geophysical Research Atmospheres %@ 0148-0227 %D 1999-05-01 %I American Geophysical Union (AGU) %~ DeepDyve