Bendings of radio jets in BL Lacertae objects - I. EVN and MERLIN observations P. Cassaro, C. Stanghellini, D. Dallacasa, M. Bondi and R. A. Zappalà A&A, 381 2 (2002) 378-388 Published online: 15 January 2002 DOI: 10.1051/0004-6361:20011460