Detailed Notes on ???? ????? ?? ?????? ?????? ??? ???? ??? ????? ????????????? ????? ?? ???? ??? ???? ?????????????? ????? ???? ????? ????????????? ?? ????.???? ????? ?? ??? ??????? ??? ???????? ? ?????? ?? ???? ??? ?????????????? ???? ???? ???? ??????? ?? ?????? ???? ???? ?????? ??????? ???????? ???????? ?????? ?????? ???? ??? ???? ???? ????? ????