@article{behkam2008effect,
  title = {Effect of quantity and configuration of attached bacteria on bacterial propulsion of microbeads},
  journal = {Applied Physics Letters},
  volume = {93},
  number = {22},
  pages = {223901},
  publisher = {AIP},
  year = {2008},
  author = {Behkam, Bahareh and Sitti, Metin}
}