Intodruction: Ideas and Practice of Crusading in Iberia and the Baltic Region, 1100-1500 - Nielsen, Torben Kjersgaard (. Crusading on the edge. - Turnhout : Brepols, [2016]. - xv, 409 Seiten. - Illustrationen, Pläne. - ISBN 2-503-54881-4, 2016)