Lackner, Wolfgang. 2021. „Buchthal, Hugo - Belting, Hans: Patronage in Thirteenth-Century Constantinople. An Atelier of Late Byzantine Book Illumination and Calligraphy“. Südost-Forschungen 1 (1):586-88. http://bsb0sit-zepweb01.bsb.lrz.de/portal/index.php/sof/article/view/9887.