Ludwik Niemiec a Obodryci i Duńczycy od traktatu w Verdun w 843 r.Published in:Res Historica, 2021, v. 51, p. 43, doi. 10.17951/rh.2021.51.43-62By:Sochacki, JarosławPublication type:Article
Oaths of Strasbourg sworn.Published in:History Today, 2017, v. 67, n. 2, p. 8Publication type:Article
The Intercourse of the Danes with the Franks, &c.Published in:Transactions of the Royal Historical Society, 1885, v. 2, n. 3, p. 302, doi. 10.2307/3677874By:Howorth, Henry H.Publication type:Article