Author of Bertels Bedste – sange og fortællinger fra Borgen (The Best of Bertel – songs and narratives from the Danish Parliament), »Op mod strømmen - med højskolen i ryggen« (Against the tide – backed by the Danish folk high school), 2012, »Den bløde kynisme« (Soft Cynicism), 1997, »Lille land, hvad nu?« (Little Country – What Now?), 1994, »Slip friheden løs« (Release Freedom), 1990, »Grænser for politik« (Limits to Politics), 1990, »Midt i en klynketid« (In a Time of Whining), 1980, »Danskerne år 2002« (The Danes in the Year 2002), 1977, »Den organiserede arbejdsløshed« (Organised Unemployment), 1975, »Institutionernes Tyranni« (The Tyranny of the Institutions), 1974 and »Statskollektivisme og Spildproduktion«, (State Collectivism and Surplus Production), 1973.
Co-author of the Liberal Party's EU programme, 2001, The human rights report of the European Parliament, 1998-1999, »Ny-liberalismen – og dens rødder« (New Liberalism – and its Roots), 1982, »Kampen om gymnasiet« (The Struggle for the Upper Secondary School), 1982 and the Liberal Party's policy programme, 1979.