Jager, H., & Jong, E. d. (1979). The SDR's interest rate change: Its significance for the role of the SDR as principal reserve asset and the size of a substitution account. Institute of Economic Research, University of Groningen.

Jager, H., and E. de Jong. The SDR's Interest Rate Change: Its Significance for the Role of the SDR as Principal Reserve Asset and the Size of a Substitution Account. Groningen: Institute of Economic Research, University of Groningen, 1979.

Jager, H., and E. de Jong. The SDR's Interest Rate Change: Its Significance for the Role of the SDR as Principal Reserve Asset and the Size of a Substitution Account. Institute of Economic Research, University of Groningen, 1979.