Estimating Bucket Accesses: A Practical Approach. - Alle IJbema; Henk M. Blanken (ICDE, 1986)

Language Concepts for Versioned Hierarchical Objects. - Henk M. Blanken; Alle IJbema (Temporal Aspects in Information Systems, 1987)

The Generalized Grid File: Description and Performance Aspects. - Henk M. Blanken; Alle IJbema; Paul Meek; Bert van den Akker (ICDE, 1990)