@article{221,
  author = {M. Levine and others},
  title = {Escherichia coli strains that cause diarrhoea but do not produce heat-labile or heat-stable enterotoxins and are non-invasive},
  year = {1978},
  journal = {Lancet},
  volume = {1},
  number = {8074},
  pages = {1119-1122},
  url = {http://www.sciencedirect.com/science/article/pii/S0140673678902994},
  language = {eng},
}