Статья в википедии на русском:http://ru.wikipedia.org/wiki/%D0%9F%D0%B0%D0%BF%D0%B8%D0%BB%D0%BB%D0%BE%D0%BC%D0%B0%D0%B2%D0%B8%D1%80%D1%83%D1%81_%D1%87%D0%B5%D0%BB%D0%BE%D0%B2%D0%B5%D0%BA%D0%B0