@article{Legatiuk2021,
  author    = {Dmitrii Legatiuk},
  title     = {Mathematical Modelling by Help of Category Theory: Models and Relations between Them},
  journal   = {mathematics},
  volume    = {2021},
  number    = {volume 9, issue 16, article 1946},
  doi       = {10.3390/math9161946},
  url       = {https://www.mdpi.com/2227-7390/9/16/1946?type=check_update\&version=1},
  year      = {2021},
}