Leegaard Knudsen, Anders. “Registrum Ecclesie Aboensis Eller Åbo Domkyrkas Svartbok. The Black Book of the Cathedral. Facsimile Version of the 1890 Edition With a New Introduction and Translations of the Original Preface and the Register of Documents With Brief Introductions. Kansallisarkisto - Riksarkivet 1996.88 + 8 + XXXIII + 668 s., 2 Ill”. Historisk Tidsskrift, bd. 16, januar 1997, s. 213-4, doi:10.7146/ht.v16i0.53838.