@techreport{zu23686,
            type = {????????? ????},
           title = {DERI ? ???????? ????????? ??????????? ????????????
},
          author = {?????? ???? and ???? ???????},
       publisher = {DERI ???????? ???????????? 2009-06-21},
            year = {2009},
             url = {http://eprints.zu.edu.ua/3686/}
}