Evidence for water ice and estimate of dust production rate in comet Hale-Bopp at 2.9 AU from the Sun
Journal article published in 1998 by
E. Lellouch,
J. Crovisier,
T. Lim,
D. Bockelée-Morvan,
K. Leech,
Hanner,
B. Altieri,
B. Schmitt 
,
F. Trotta,
H. U. Keller
,
F. Trotta,
H. U. Keller
