A semantic data model for indoor navigation. - Liu Liu 010; Sisi Zlatanova (ISA, 2012)

A conceptual framework of space subdivision for indoor navigation. - Sisi Zlatanova; Liu Liu 010; George Sithole (ISA, 2013)

An Approach for Indoor Path Computation among Obstacles that Considers User Dimension. - Liu Liu 010; Sisi Zlatanova (ISPRS Int. J. Geo Inf., 2015)

Indoor Semantic Modelling for Routing: The Two-Level Routing Approach for Indoor Navigation. - Liu Liu 010 (2017)

Indoor Routing on Logical Network Using Space Semantics. - Liu Liu 010; Sisi Zlatanova; Bofeng Li; Peter van Oosterom; Hua Liu; Jack Barton (ISPRS Int. J. Geo Inf., 2019)

Weighted octree-based 3D indoor pathfinding for multiple locomotion types. - Junqiao Zhao; Qiaoyu Xu; Sisi Zlatanova; Liu Liu 010; Chen Ye 002; Tiantian Feng (Int. J. Appl. Earth Obs. Geoinformation, 2022)

A spatial data model for accessibility with indoor temporal changes. - Liu Liu 010; Sisi Zlatanova (Trans. GIS, 2022)