Flavor symmetry breaking and scaling for improved staggered actions in quenched QCD M. Cheng, N. Christ, C. Jung, F. Karsch, R. Mawhinney, P. Petreczky and K. Petrov Eur. Phys. J. C, 51 4 (2007) 875-881 Published online: 01 August 2007 DOI: 10.1140/epjc/s10052-007-0336-1