The role of Kelvin-Helmholtz instability in the internal structure of relativistic outflows. The case of the jet in 3C 273M. Perucho, A. P. Lobanov, J.-M. Martí and P. E. HardeeA&A, 456 2 (2006) 493-504DOI: https://doi.org/10.1051/0004-6361:20065310