@article{JMLR:v20:17-629,
  author  = {Ben Dai and Junhui Wang and Xiaotong Shen and Annie Qu},
  title   = {Smooth neighborhood recommender systems},
  journal = {Journal of Machine Learning Research},
  year    = {2019},
  volume  = {20},
  number  = {16},
  pages   = {1--24},
  url     = {http://jmlr.org/papers/v20/17-629.html}
}