для общего развития и кругозора: https://ru.wikipedia.org/wiki/%D0%9E%D0%B1%D0%BE%D0%BB%D0%B5%D0%BD%D1%81%D0%BA_%28%D0%BF%D0%BE%D1%81%D1%91%D0%BB%D0%BE%D0%BA_%D0%B3%D0%BE%D1%80%D0%BE%D0%B4%D1%81%D0%BA%D0%BE%D0%B3%D0%BE_%D1%82%D0%B8%D0%BF%D0%B0%29https://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_%D0%BD%D0%B0%D1%83%D1%87%D0%BD%D1%8B%D0%B9_%D1%86%D0%B5%D0%BD%D1%82%D1%80_%D0%BF%D1%80%D0%B8%D0%BA%D0%BB%D0%B0%D0%B4%D0%BD%D0%BE%D0%B9_%D0%BC%D0%B8%D0%BA%D1%80%D0%BE%D0%B1%D0%B8%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D0%B8_%D0%B8_%D0%B1%D0%B8%D0%BE%D1%82%D0%B5%D1%85%D0%BD%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D0%B8