Monitoring and characterization of extended-spectrum β-lactamases in Escherichia coli strains from healthy and sick animals in Spain in 2003

1. Briñas, L.
2. Moreno, M.A.
3. Teshager, T.
4. Sáenz, Y.
5. Porrero, M.C.
6. Domínguez, L.
7. Torres, C.