^Leif Lewin (1989) Ideology and Strategy: A Century of Swedish Politics Cambridge University Press, p329
^Kreuzer, Marcus; Neely, Runa (13 May 2024), "Sweden's Peculiar Adoption of Proportional Representation: The Overlooked Effects of Time and History", Perspectives on Politics, Cambridge University Press, doi:10.1017/S153759272400063X