https://ru.wikipedia.org/wiki/%D0%98%D1%81%D1%82%D0%BE%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9_%D0%BC%D1%83%D0%B7%D0%B5%D0%B9_(%D0%A1%D1%82%D0%BE%D0%BA%D0%B3%D0%BE%D0%BB%D1%8C%D0%BC)
http://historiska.se/home/