http://ru.wikipedia.org/wiki/%D0%9C%D0%BE%D0%B9_%D0%BB%D1%83%D1%87%D1%88%D0%B8%D0%B9_%D0%BB%D1%8E%D0%B1%D0%BE%D0%B2%D0%BD%D0%B8%D0%BA_(%D1%84%D0%B8%D0%BB%D1%8C%D0%BC) - нашла