Skyum-Nielsen, N. (1980) “Thomas Riis: Les institutions politiqucs ccntralcs du Danemark 1100-1332. Odense University Studies in History and Social Sciences 46, Odense University Press 1977. 397 s. 90 kr. + moms”., Historisk Tidsskrift, 14. doi: 10.7146/ht.v14i0.52326.