@article{zu225683,
          number = {5},
           month = {????????},
          author = {?. ?. ????????????},
           title = {????? ????? ? E-Olymp},
       publisher = {???-?? ?.?.??????, ???????},
         journal = {????????? ??????? ???????? ???????????},
           pages = {25--28},
            year = {2017},
             url = {http://eprints.zu.edu.ua/25683/}
}