A Multidimensional Modeling Approach for OLAP within the Framework on the Relational Model based on Quotient Relations. - Oscar Mangisengi; A Min Tjoa (DOLAP, 1998)

Meta-data for Data Warehouses Using Extended Relational Models. - Oscar Mangisengi; A Min Tjoa; Roland R. Wagner (MD, 1999)

Metadata for object-relational data warehouse. - Thanh N. Huynh; Oscar Mangisengi; A Min Tjoa (DMDW, 2000)

Metadata Management Concept for Multidimensional OLAP Data based on Object-Oriented Concepts. - Oscar Mangisengi; A Min Tjoa; Roland R. Wagner (WISE, 2000)

A Framework for Supporting Interoperability of Data Warehouse Islands Using XML. - Oscar Mangisengi; Johannes Huber; Christian Hawel; Wolfgang Eßmayr (DaWaK, 2001)

Meta Cube-X: An XML Metadata Foundation for Interoperability Search among Web Data Warehouses. - Binh Thanh Nguyen 001; A Min Tjoa; Oscar Mangisengi (DMDW, 2001)

A Framework for a Multidimensional OLAP Model using Topic Maps. - Robert M. Bruckner; Tok Wang Ling; Oscar Mangisengi; A Min Tjoa (WISE (2), 2001)

MetaCube XTM: A Multidimensional Metadata Approach for Semantic Web Warehousing Systems. - Binh Thanh Nguyen 001; A Min Tjoa; Oscar Mangisengi (DaWaK, 2003)

P2P Knowledge Management: an Investigation of the Technical Architecture and Main Processes. - Oscar Mangisengi; Wolfgang Eßmayr (DEXA Workshops, 2003)

XML-Based OLAP Query Processing in a Federated Data Warehouses. - Oscar Mangisengi; Wolfgang Eßmayr; Johannes Huber; Edgar R. Weippl (ICEIS (1), 2003)

Activity warehouse: Data management for business activity monitoring. - Oscar Mangisengi; Mario Pichler; Dagmar Auer; Dirk Draheim; Hildegard Rumetshofer (ICEIS (1), 2007)

Towards a Closed-Loop Business Intelligence Framework. - Oscar Mangisengi; Ngoc Thanh Huynh (ICEIS (1), 2008)