@article{ahybridlevelbasedlearningswarmalgorithm,
  title = {A hybrid level-based learning swarm algorithm with mutation operator for solving large-scale cardinality-constrained portfolio optimization problems},
  author = {Massimiliano Kaucic and Filippo Piccotto and Gabriele Sbaiz and Giorgio Valentinuz},
  year = {2022},
  eprint = {2206.14760},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2206.14760v1},
}