Antimicrobial resistance in Pasteurella and Mannheimia: epidemiology and genetic basisCorinna Kehrenberg, Gundula Schulze-Tanzil, Jean-Louis Martel, Elisabeth Chaslus-Dancla and Stefan SchwarzVet. Res., 32 3-4 (2001) 323-339DOI: https://doi.org/10.1051/vetres:2001128