InfoLOD and LandMark: Browsing and Retrieving Spatial Data. - Kengo Koiso; Takahiro Matsumoto; Hiroaki Kawagishi; Katsumi Tanaka (CODAS, 1999)

Dynamic Zone Retrieval and Landmark Computation for Spatial Data. - Hiroaki Kawagishi; Kengo Koiso; Katsumi Tanaka (Digital Cities, 2000)

InfoLOD and LandMark: Spatial Presentation of Attribute Information and Computing Representative Objects for Spatial Data. - Kengo Koiso; Takehisa Mori; Hiroaki Kawagishi; Katsumi Tanaka; Takahiro Matsumoto (Int. J. Cooperative Inf. Syst., 2000)