Restle, C.S. 2018. The Acquisition of the Wildhagen, Bitter, and Paur Collections by Alfred Berner for the Berlin Musikinstrumenten-Museum between 1957 and 1962: Questions of Provenance. Private Passion – Public Challenge: Musikinstrumente sammeln in Geschichte und Gegenwart. D. von Roth und L. Escherich, Hrsg. arthistoricum.net. 187–194.