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