@patent{SchToyUyt08b,
  title = {Interactive images},
  howpublished = {United States Patent, No 7444015},
  month = oct,
  year = {2008},
  note = {(active)},
  slug = {schtoyuyt08b},
  author = {Sch{\"o}lkopf, B. and Toyama, K. and Uyttendaele, M.},
  month_numeric = {10}
}