Renormalizability of a quark–gluon model with soft BRST breaking in the infrared region L. Baulieu, M. A. L. Capri, A. J. Gómez, V. E. R. Lemes, R. F. Sobreiro and S. P. Sorella Eur. Phys. J. C, 66 3-4 (2010) 451-464 Published online: 11 February 2010 DOI: 10.1140/epjc/s10052-010-1250-5