@article{lockfreeoptimizationfornonconvex,
  title = {Lock-Free Optimization for Non-Convex Problems},
  author = {Shen-Yi Zhao and Gong-Duo Zhang and Wu-Jun Li},
  year = {2016},
  eprint = {1612.03441},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1612.03441v1},
}