Behrendt, Alexander. “Pilgrimages of Princes in the 15th Century – Two Holy Land Journeys of German Princes via Rome. A Distinction to the Lower Nobility Class Journeys”. Almatourism - Journal of Tourism, Culture and Territorial Development, vol. 8, no. 6, Jan. 2017, pp. 89-105, doi:10.6092/issn.2036-5195/6665.