Title: Giotto's Comet - was it the Comet of 1304 and not Comet Halley?
Authors: Hughes, D. W., Yau, K. K. C., & Stephenson, F. R.
Journal: Quarterly Journal of the Royal Astronomical Society, vol. 34, 21-32. Article.
Bibliographic Code: 1993QJRAS..34...21H