Processing Operations with Restrictions in RDBMS without External Sorting: The Tetris Algorithm. - Volker Markl; Martin Zirkel; Rudolf Bayer (ICDE, 1999)

Efficient Processing of the Cube Operator. - Martin Zirkel (EDBT PhD Workshop, 2000)

Integrating the UB-Tree into a Database System Kernel. - Frank Ramsak; Volker Markl; Robert Fenk; Martin Zirkel; Klaus Elhardt; Rudolf Bayer (VLDB, 2000)

Exploitation of Pre-sortedness for Sorting in Query Processing: The TempTris-Algorithm for UB-Trees. - Martin Zirkel; Volker Markl; Rudolf Bayer (IDEAS, 2001)

Bewertung des UB-Baums unter Berücksichtigung der Sortierung. - Martin Zirkel (2004)

BI-Governance - Königsdisziplin strategischer Business Intelligence. - Uwe Trost; Martin Zirkel (Data Warehousing, 2008)