Fredrikstad bys historie is a six-volume book series on the history of the Norwegian town Fredrikstad. The first five volumes were written by Martin Dehli, whilst the sixth was written by Ivo de Figueiredo.[1]
^Sandvik, Pål Thonstad (2000). "Ivo de Figueiredo, Fredrikstad bys historie VI, mot et nytt årtusen 1964-1993". HIFO-nytt (in Norwegian) (3). Norwegian Historical Association.