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Stapleton, P.D., Shannon, K.P. and French, G.L. (1999) Carbapenem resistance in Escherichia coli associated with plasmid-determined CMY-4 beta-lactamase production and loss of an outer membrane protein. Antimicrobial Agents and Chemotherapy, 43 (5). pp. 1206-1210.
Stapleton, P.D., Shannon, K.P. and French, G.L. (1999) Construction and Characterization of Mutants of the TEM-1 b-Lactamase Containing Amino Acid Substitutions Associated with both Extended-Spectrum Resistance and Resistance to b-Lactamase Inhibitors. Antimicrobial Agents and Chemotherapy, 43 (8). pp. 1881-1887.