???? ????? ??. ?? ???? ???? ????? ?? ??? ??? ???????? ?? ??? ?? ???? ??? ??? ????? ????, ?? ?? ??? ? ???? ?? ????.??? ?? ???? ???? ? ???? ??? ???? ??? ? ? ??, ?? ??? ??? ?? ?? ??.???????????????????????????????????????????????????????????????(?????????????)???????(?????????????)?Both equally the bibliographical examining and the data selection in n