Olsen, Ingolf. “Lidenskab I Utide. Anm. Af Catalogue of the Rischel and Birket-Smith Collection of Guitar Music in The Royal Library of Copenhagen. 1989”. Magasin fra Det Kongelige Bibliotek 5, no. 1 (juli 1, 1990): 71–73. Set april 30, 2024. https://tidsskrift.dk/magasin/article/view/66235.