Tomographic-probability description of solitons in Bose-Einstein condensates S. De Nicola, R. Fedele, M. A. Man'ko and V. I. Man'ko Eur. Phys. J. B, 36 3 (2003) 385-390 Published online: 23 December 2003 DOI: 10.1140/epjb/e2003-00357-2