Invocations by Knights for Supernatural Aid in the Sources of the Baltic Crusades, Medieval Poland and the "Chansons" of the Crusades - Kangas, Sini (. Religious rites of war beyond the medieval West ; Volume 1. Northern Europe and the Baltic. - Leiden : Brill, [2023]. - XV, 313 Seiten. - Illustrationen, Karten. - ISBN 978-90-04-68340-2, 2023)