Integral field spectroscopy of nitrogen overabundant blue compact dwarf galaxies E. Pérez-Montero, J. M. Vílchez, B. Cedrés, G. F. Hägele, M. Mollá, C. Kehrig, A. I. Díaz, R. García-Benito and D. Martín-Gordón A&A, 532 (2011) A141 Published online: 08 August 2011 DOI: 10.1051/0004-6361/201116582