1. The abundance of sulfur in comets;Azoulay,1986
2. Evolution of the outgassing of Comet Hale–Bopp (C/1995 O1) from radio observations;Biver;Science,1997
3. The nature of the 2.8-μm emission feature in cometary spectra;Bockelee-Morvan;Astron. Astrophys.,1989
4. Observations of parent molecules in Comets P/Brorsen–Metcalf (1989o). Austin (1989c1), and Levy (1990c) at millimetre wavelengths: HCN, H223;Bockelee-Morvan,1990
5. Molecular observations of C/1995 O1 (Hale–Bopp) with the IRAM Telescopes near perihelion: Interferometric maps and new parent molecules;Bockelee-Morvan;Bull. Am. Astron. Soc.,1997