Pox 186: An ultracompact galaxy with dominant ionized gas emission N. G. Guseva, P. Papaderos, Y. I. Izotov, K. G. Noeske and K. J. Fricke A&A, 421 2 (2004) 519-528 Published online: 22 June 2004 DOI: 10.1051/0004-6361:20035949