Bound states of topological defects in parametrically excited capillary waves V. O. Afenchenko, A. B. Ezersky, S. V. Kiyashko and A. V. Nazarovsky Eur. Phys. J. Special Topics, 146 (2007) 99-110 Published online: 05 July 2007 DOI: 10.1140/epjst/e2007-00172-1