Remark: Corrections and Errors in John Ivie's Some MACSYMA Programs for Solving Recurrence Relations. - Pedro Celis (ACM Trans. Math. Softw., 1984)

Robin Hood Hashing (Preliminary Report) - Pedro Celis; Per-Åke Larson; J. Ian Munro (FOCS, 1985)

Techniques for Collision Resolution in Hash Tables with Open Addressing. - J. Ian Munro; Pedro Celis (FJCC, 1986)

Distribution, Parallelism, and Availability in NonStop SQL. - Pedro Celis (SIGMOD Conference, 1992)

The analysis of hashing with lazy deletions. - Pedro Celis; John V. Franco (Inf. Sci., 1992)

The Query Execution Engine in Tandem's new ServerWare SQL Product. - Pedro Celis; Hansjörg Zeller (PDIS, 1996)

The Query Optimizer in Tandem's new ServerWare SQL Product. - Pedro Celis (VLDB, 1996)

Subquery Elimination: A Complete Unnesting Algorithm for an Extended Relational Algebra. - Pedro Celis; Hansjörg Zeller (ICDE, 1997)