@article{JMLR:v17:zhang16a,
  author  = {Chong Zhang and Yufeng Liu and Yichao Wu},
  title   = {On Quantile Regression in Reproducing Kernel Hilbert Spaces with the Data Sparsity Constraint},
  journal = {Journal of Machine Learning Research},
  year    = {2016},
  volume  = {17},
  number  = {40},
  pages   = {1--45},
  url     = {http://jmlr.org/papers/v17/zhang16a.html}
}