Resources for Castle Construction in Medieval Prussia and Livonia - Hayward, Kevin M. J.; Black, Stuart (. Terra Sacra ; 2. Ecologies of crusading, colonization, and religious conversion in the Medieval Baltic. - Turnhout : Brepols, [2019]. - xviii, 243 Seiten. - Illustrationen, Diagramme, Karten. - ISBN 978-2-503-55133-3, 2019)