@article{thebernsteinfunctionaunifyingframework,
  title = {The Bernstein Function: A Unifying Framework of Nonconvex Penalization in Sparse Estimation},
  author = {Zhihua Zhang},
  year = {2013},
  eprint = {1312.4719},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1312.4719v1},
}