@article{portfoliooptimization,
  title = {Portfolio Optimization},
  author = {Aizhan Issagali and Damira Alshimbayeva and Aidana Zhalgas},
  year = {2015},
  eprint = {1505.05491},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1505.05491v2},
}