Deep VLT spectroscopy of the blue compact dwarf galaxies Tol 1214–277 and Tol 65 Y. I. Izotov, P. Papaderos, N. G. Guseva, K. J. Fricke and T. X. Thuan A&A, 421 2 (2004) 539-554 Published online: 22 June 2004 DOI: 10.1051/0004-6361:20035847