1.6 GHz VLBI observations of SN 1979C: almost-free expansion J. M. Marcaide, I. Martí-Vidal, M. A. Perez-Torres, A. Alberdi, J. C. Guirado, E. Ros and K. W. Weiler A&A, 503 3 (2009) 869-872 Published online: 16 July 2009 DOI: 10.1051/0004-6361/200912485