http://ru.wikipedia.org/wiki/%D0%98%D0%BD%D1%86%D0%B8%D0%B4%D0%B5%D0%BD%D1%82_%D1%81_%D1%8E%D0%B6%D0%BD%D0%BE%D0%BA%D0%BE%D1%80%D0%B5%D0%B9%D1%81%D0%BA%D0%B8%D0%BC_%D0%91%D0%BE%D0%B8%D0%BD%D0%B3%D0%BE%D0%BC_(1983)