http://newdc.ajourdot.com/?page=artist&id=1385&k=1 Dacapo Brief biography with photograph. http://www.mic.dk/db.cgi?db=en&uid=default&view_records_entry=11&ID=1198 Danish Music Information Center (MIC) Summary of his life with photograph. http://www.wilhelm-hansen.dk/en/_composer.asp?id=1 Form and Freedom Biography, picture, and works. http://www.schirmer.com/composers/abrahamsen/bio.html Schirmer Biography, work list, review.