http://yandex.ru/yandsearch?text=%D0%B0%D0%BD%D0%B0%D0%BB%D0%B8%D0%B7+%D0%BE%D0%BF%D1%80%D0%B5%D0%B4%D0%B5%D0%BB%D0%B5%D0%BD%D0%B8%D0%B5+%D0%BF%D0%BE%D0%BB%D0%B0+%D1%80%D0%B5%D0%B1%D0%B5%D0%BD%D0%BA%D0%B0+%D0%BF%D0%BE+%D0%BA%D1%80%D0%BE%D0%B2%D0%B8+&lr=213 есть такой анализ.