Haas, Melanie; Niedermayer; Stöss, Richard (2006). Die Parteiensysteme Westeuropas. Springer-Verlag. p. 268. ISBN9783531141114.
Bergmann, Eirikur; Einarsson, Eiríkur Bergmann (2014). Iceland and the International Financial Crisis: Boom, Bust and Recovery. Palgrave Macmillan. p. 34. ISBN9781137332004.