@article{JMLR:v22:20-661,
  author  = {Kyriakos Axiotis and Maxim Sviridenko},
  title   = {Sparse Convex Optimization via Adaptively Regularized Hard Thresholding},
  journal = {Journal of Machine Learning Research},
  year    = {2021},
  volume  = {22},
  number  = {122},
  pages   = {1--47},
  url     = {http://jmlr.org/papers/v22/20-661.html}
}