Functional Evaluation of OQL Queries. - Georges Gardarin; Fernando Machuca; Philippe Pucheral (BDA, 1994)

Query Optimization as Object Functional Language (OFL) Transformations. - Georges Gardarin; Fernando Machuca (BDA, 1995)

OFL: A Functional Execution Model for Object Query Languages. - Georges Gardarin; Fernando Machuca; Philippe Pucheral (SIGMOD Conference, 1995)

Cost-Controlled OFL Rewriting Rules for Multiple Collection Traversals. - Didier Chrétien; Fernando Machuca; Puthirak Om; Zhao-Hui Tang (International Hong Kong Computer Society Database Workshop, 1996)

Enhancing the exploitation of data mining in relational database systems via the rough sets theory including precision variables. - Fernando Machuca; Marta Millán (SAC, 1998)

New Algebraic Operators and SQL Primitives for Mining Association Rules. - Ricardo Timarán Pereira; Marta Millán; Fernando Machuca (Neural Networks and Computational Intelligence, 2003)