Languages for Multi-database Interoperability. - Frédéric Gingras; Laks V. S. Lakshmanan; Iyer N. Subramanian; Despina Papoulis; Nematollaah Shiri (SIGMOD Conference, 1997)

nD-SQL: A Multi-Dimensional Language for Interoperability and OLAP. - Frédéric Gingras; Laks V. S. Lakshmanan (VLDB, 1998)