Tripod: A Comprehensive Model for Spatial and Aspatial Historical Objects. - Tony Griffiths; Alvaro A. A. Fernandes; Norman W. Paton; Keith T. Mason; Bo Huang 001; Michael F. Worboys (ER, 2001)

Tripod: A Comprehensive System for the Management of Spatial and Aspatial Historical Objects. - Tony Griffiths; Alvaro A. A. Fernandes; Norman W. Paton; Keith T. Mason; Bo Huang 001; Michael F. Worboys; Chris Johnson 005; John G. Stell (ACM-GIS, 2001)

Spatio-Temporal Databases in Practice: Directly Supporting Previously Developed Land Data Using Tripod. - Tony Griffiths; Alvaro A. A. Fernandes; Norman W. Paton; Seung-Hyun Jeong 003; Nassima Djafri; Keith T. Mason (ICDE, 2005)

Qualitative reasoning about consistency in geographic information. - Matt Duckham; Jenny Lingham; Keith T. Mason; Michael F. Worboys (Inf. Sci., 2006)