@article{
  author = {Chala, Nina, Poplavska, Oksana, Danylevych, Nataliya, Maksma, Mariya},
  title = {Competencies of Personnel in Economy 4.0: Challenges and Solutions},
  journal = {Journal of Optimization in Industrial Engineering},
  year = {2021},
  volume = {14},
  number = {3},
  pages = {53-59},
  doi = {10.22094/joie.2020.677818}
}