@book{zu229544, month = {???????}, title = {????????? ???????? ????????????? ?????????}, author = {?. ?. ?????????? and ?. ?. ??????? and ?. ?. ??????}, publisher = {???????????? ????????? ??????????? ????? ????? ??????}, year = {2019}, url = {http://eprints.zu.edu.ua/29544/} }