2-http://www.zapiski.info/1520/%D0%A5%D0%B5%D0%BA%D1%82%D0%BE%D1%80-%D1%87%D0%BE%D0%B2%D0%B5%D0%BA%D1%8A%D1%82-%D0%B2%D0%BE%D0%B8%D0%BD http://www.referati.org/plenitelnoto...ktor/10809/ref 1-http://www.kaminata.net/topic-t14865.html http://www.neznam.bg/%D1%83%D1%87%D0...9E%D0%99%D0%9D