Database maintenance efficiency using differential files. - V. J. Kollias; Michael Hatzopoulos; John G. Kollias (Inf. Syst., 1980)

The Application of a Number of Differential Files to the Maintenance of Large Databases. - Michael Hatzopoulos; John G. Kollias; V. J. Kollias (Angew. Inform., 1981)

Consistency in Point-in-Point Polygon Tests. - F. Warren Burton; V. J. Kollias; John G. Kollias (Comput. J., 1984)

On the Optimal Incorporation of the Differential File Into a New Generation of the Database. - Michael Hatzopoulos; John G. Kollias; V. J. Kollias (Angew. Inform., 1984)

Expected and worst-case storage requirements for quadtrees. - F. Warren Burton; Vassiliki J. Kollias; John G. Kollias (Pattern Recognit. Lett., 1985)

Real-Time Raster to Quadtree and Quadtree to Raster Conversion Algorithms with Modest Storage Requirements. - F. Warren Burton; V. J. Kollias; John G. Kollias (Angew. Inform., 1986)

A General PASCAL Program for Map Overlay of Quadtrees and Related Problems. - F. Warren Burton; V. J. Kollias; John G. Kollias (Comput. J., 1987)

Fuzzy reasoning in the development of geographical information systems FRSIS: a prototype soil information system with fuzzy retrieval capabilities. - Vassiliki J. Kollias; Achilleas Voliotis (Int. J. Geogr. Inf. Sci., 1991)

Evaluation of three spatial interpolation methods to estimate forest volume in the municipal forest of the Greek island Skyros. - Dionissios P. Kalivas; Vassiliki J. Kollias; Ektoras H. Apostolidis (Geo spatial Inf. Sci., 2013)