@article{speedingupmemorybasedcollaborative,
  title = {Speeding up Memory-based Collaborative Filtering with Landmarks},
  author = {Lima Gustavo R. and Mello Carlos E. and Zimbrao Geraldo},
  year = {2017},
  eprint = {1705.07051},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1705.07051v1},
}