Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Shunichiro Oe and Chao-Ning Chan and Chern-Sheng Lin,Active Eye-tracking System by Using Quad PTZ Cameras,IECON 2007 - 33rd Annual Conference of the IEEE Industrial Electronics Society,,IEEE,2007-01-01,,,2389-2394,https://cir.nii.ac.jp/crid/1871709542783721472,https://doi.org/10.1109/iecon.2007.4460366