Determination of the clonal structure of avian Escherichia coli strains by isoenzyme and ribotyping analysis - Silveira, W. D. da; Lancellotti, M.; Castro, Antonio Fernando Pestana de; Ferreira, A.; Solferini, V. N.; Stehling, E. G.; Brocchi, M. (Journal Veterinary Medicine. B, Infections Diseases and Veterinary Public Health, 2003)