Olsen, I. 1990. 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, 1 (jul. 1990), 71–73. DOI:https://doi.org/10.7146/mag.v5i1.66235.