@article{zu231857,
          volume = {?},
          number = {??},
          author = {?. ?. ?????????},
           title = {?????????-????????? ????? ?????? ??????????? ? 30-? ????? ?? ??.},
       publisher = {?????????? ??????},
         journal = {????????? ??????? ?????????? ???????????'?},
           pages = {291--303},
            year = {2020},
             url = {http://eprints.zu.edu.ua/31857/}
}