Lee, C.H.C.H.LeeTsai, M.H.M.H.TsaiKang, S.C.S.C.Kang2020-07-062020-07-062013https://scholars.lib.ntu.edu.tw/handle/123456789/508971London, UK. October 30-31.VAO Checker: Accessibility Study for Pipeline Maintenanceconference paper