1. Batenburg, R., 1995/7. The external management of automation 1995 (MAT95). Codebook of MAT95. ISCORE paper no. 58, Utrecht University, 218pp,. http://www.fss.uu.nl/soc/iscore.
2. Batenburg, R., Raub, W., Snijders, C., 2000. Contacts and contracts: temporal embeddedness and the contractual behaviour of firms. ISCORE paper no. 107, Utrecht University, 34pp, http://www.fss.uu.nl/soc/iscore.
3. Buskens, V., Batenburg, R., 2000. The external management of automation. Codebook for the combined data from The Netherlands and Germany. ISCORE paper no. 175, Utrecht University, 258 pp, http://www.fss.uu.nl/soc/iscore.
4. Expert systems in purchasing;Cook;International Journal of Purchasing and Materials Management,1992
5. Case-based reasoning systems in purchasing;Cook;International Journal of Purchasing and Materials Management,1997