ru.m.wikipedia.org/wiki/%D0%92%D0%BE%D1%81%D1%82%D0%BE%D1%87%D0%BD%D1%8B%D0%B5_%D1%81%D0%BB%D0%B0%D0%B2%D1%8F%D0%BD%D0%B5За исходники не скажу, не помню