On The Expressive Power Of The Relational Model: A Database Designer's Point Of View. - René J. Veldwijk; Eduard R. K. Spoor; Martin Boogaard; M. V. van Duk (ICIS, 1991)

An Alternative Approach to Generalization in the Relational Model. - Martin Boogaard; René J. Veldwijk; Eduard R. K. Spoor (ISCO, 1992)

Logical Data Independence Via Views: A Misapprehension? - Jonas M. de Graaff; René J. Veldwijk; Martin Boogaard (DASFAA, 1993)

Why Views Do Not Provide Logical Data Independence. - Martin Boogaard; Jonas M. de Graaff; René J. Veldwijk (ICCI, 1993)

Assessing the Software Crisis: Why Information Systems are Beyond Control. - René J. Veldwijk; Martin Boogaard; Eduard R. K. Spoor (Inf. Sci., 1994)