Chou, P.-L.P.-L.ChouOh-Yang, Y.-C.Y.-C.Oh-YangChen, K.-H.K.-H.ChenSong, T.-H.T.-H.SongCheng, C.-Y.C.-Y.Cheng2019-02-232019-02-232001https://scholars.lib.ntu.edu.tw/handle/123456789/403841A method for associating attributes to documents.patentEPO No. EP1158426