@article{KnappHackerThenetal.1984,
  author    = {Stefan Knapp and J{\"o}rg Hacker and Irene Then and Dorothee M{\"u}ller and Werner Goebel},
  title     = {Multiple copies of hemolysin genes and associated sequences in the chromosome of uropathogenic Escherichia coli strains},
  year      = {1984},
}