Hansen, B. (1950) “Karl Marx and the Close of His System. By Eugen von Böhm-Bawerk. Bohm-Bawerk’s Criticism of Marx. By Rudolf Hilferding”., Nationaløkonomisk Tidsskrift, 88. Tilgængelig hos: https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/60453 (Set: 5 december 2025).