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2. Deep Impact: excavating comet Tempel 1;A’Hearn;Science,2005
3. Size estimate of “asteroid” 2060 chiron from 250GHz measurements;Altenhoff;Astron. Astrophys.,1995
4. Radio continuum observations of comet Halley;Altenhoff;Astron. Astrophys.,1986
5. Radio continuum observations of comet P/Halley at 250GHz;Altenhoff;Astron. Astrophys.,1989