Two-dimensional metallicity distribution of the ionized gas in NGC 628 and NGC 6946B. Cedrés, J. Cepa, Á. Bongiovanni, H. Castañeda, M. Sánchez-Portal and A. TomitaA&A, 545 (2012) A43DOI: https://doi.org/10.1051/0004-6361/201219571
