Transition from bright to dark dissipative solitons in dielectric barrier gas-discharge L. Stollenwerk, S. V. Gurevich, J. G. Laven and H.-G. Purwins Eur. Phys. J. D, 42 2 (2007) 273-278 Published online: 23 February 2007 DOI: 10.1140/epjd/e2007-00037-5