Yen, H.-C.H.-C.YenWang, C.-C.C.-C.WangCHENG-FU CHOU2021-02-222021-02-222020https://www.scopus.com/inward/record.url?eid=2-s2.0-85087706698&partnerID=40&md5=ddbe8428142abee83fca1c4eeab0fd31https://scholars.lib.ntu.edu.tw/handle/123456789/549186Orientation constraints for Wi-Fi SLAM using signal strength gradientsjournal article10.1007/s10514-020-09914-z2-s2.0-85087706698WOS:000546895100002