@article{ per00b,
  author = {Mike Perkowitz and Oren Etzioni},
  title = {Adaptive Web Sites},
  journal = {Communications of the ACM},
  year = {2000},
  month = {August},
  volume = {43},
  number = {8},
  pages = {152-158},
  doi = {10.1145/345124.345171}
}