Comparison between two OGC standards for indoor space: CityGML and IndoorGML. - Hyung-Gyu Ryoo; Taehoon Kim; Ki-Joune Li (ISA@SIGSPATIAL, 2015)

Generation of moving object trajectories in indoor space. - Hyung-Gyu Ryoo; Soojin Kim; Taehoon Kim; Donguk Seo; Ki-Joune Li (ISA@SIGSPATIAL, 2016)