1) http://ru.wikipedia.org/wiki/%D0%93%D0%BE%D1%81%D1%83%D0%B4%D0%B0%D1%80%D1%81%D1%82%D0%B2%D0%B5%D0%BD%D0%BD%D1%8B%D0%B9_%D1%81%D0%BB%D1%83%D0%B6%D0%B0%D1%89%D0%B8%D0%B92) http://uzao.mos.ru/doc.aspx?docid=6325