Authors:
RAUER H
ARPIGNY C
BOEHNHARDT H
COLAS F
CROVISIER J
JORDA L
KUPPERS M
MANFROID J
REMBOR K
THOMAS N
Citation: H. Rauer et al., OPTICAL OBSERVATIONS OF COMET HALE-BOPP (C 1995-O1) AT LARGE HELIOCENTRIC DISTANCES BEFORE PERIHELION/, Science, 275(5308), 1997, pp. 1909-1912