Kessels, J.W.M. (1993). Towards design standards for curriculum consistency in corporate education. PhD Thesis. University of Twente. (Publication)

Vlaming, H. (1993). Leren intern te leren. Financieel Economisch Magazine, 24(18), 70–71. (Interview)

Opleiden: duurste tool of management. (1990). Elsevier Carriere, juni, 40, 41. (Publication)

Kessels, J. W. M., & Smit, C. A. (april 1990). Probleemgestuurd opleiden. In P.R.J. Simons (Ed.), Opleiders in Organisaties, capita selecta no. 3 (pp. 74–82). (Publication)

Kessels, J. W. M., & Smit, C. A. (1990). Rollenspel, ik kijk wel. Opleiding & Ontwikkeling, 4, 9–15. (Publication)