The galactic abundance gradient from Cepheids - IV. New results for the outer discR. E. Luck, W. P. Gieren, S. M. Andrievsky, V. V. Kovtyukh, P. Fouqué, F. Pont and F. KienzleA&A, 401 3 (2003) 939-949DOI: https://doi.org/10.1051/0004-6361:20030155
