(wiki/en) Kardam,_Prince_of_Turnovo (http://en.wikipedia.org/wiki/Kardam,_Prince_of_Turnovo)
(wiki/bg) Князь Кардам Сакскобургготский (http://bg.wikipedia.org/wiki/%D0%9A%D0%B0%D1%80%D0%B4%D0%B0%D0%BC_%D0%A1%D0%B0%D0%BA%D1%81%D0%BA%D0%BE%D0%B1%D1%83%D1%80%D0%B3%D0%B3%D0%BE%D1%82%D1%81%D0%BA%D0%B8)