Stability and nonlinear adjustment of vortices in Keplerian flows G. Bodo, A. Tevzadze, G. Chagelishvili, A. Mignone, P. Rossi and A. Ferrari A&A, 475 1 (2007) 51-61 Published online: 04 September 2007 DOI: 10.1051/0004-6361:20077695