Spontaneously moving solitons in a cavity soliton laser with circular section F. Prati, G. Tissoni, L. A. Lugiato, K. M. Aghdami and M. Brambilla Eur. Phys. J. D, 59 1 (2010) 73-79 Published online: 12 May 2010 DOI: 10.1140/epjd/e2010-00123-7