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- [9] Beaming and precession in the inner jet of 3C273 IX LATIN AMERICAN REGIONAL MEETING OF THE INTERNATIONAL-ASTRONOMICAL-UNION, 2001, 11 : 139 - 140
- [10] Merlin and HST observations of the jet in 3C273 EXTRAGALACTIC RADIO SOURCES, 1996, (175): : 203 - 204