1. IFIP Advances in Information and Communication Technology;HJ Pels,2017
2. Pels, H.J.: Geïntegreerde Informatiebanken, Modulair ontwerp van het conceptuele schema, Dissertation Eindhoven University of Technology, Stenfert-Kroese, Leiden (1988) (in Dutch)
3. Pieterse, J.: Service engineers in change: count your words, a case study into professional discourse and culture within three Dutch organizations, Dissertation Open Universiteit Nederland, 14 March 2014
4. Huang, C.C., Kusiak, A.: Modularity in design of products. IEEE Trans. Syst. Man Cybern. A 28(1), 6677 (1998)
5. Gershenson, J.K., Prasad, G.J., Zhang, Y.: Product modularity: definitions and benefits. J. Eng. Des. 30(3), 295–313 (2010)