Cheng T.-HCHIH-PING WEI2020-02-102020-02-102008https://www.scopus.com/inward/record.uri?eid=2-s2.0-41149137601&doi=10.1109%2fTSMCA.2007.914758&partnerID=40&md5=772cb3cfa32dd2a12e433707ad7b7e33https://scholars.lib.ntu.edu.tw/handle/123456789/456500A clustering-based approach for integrating document-category hierarchiesjournal article10.1109/TSMCA.2007.9147582-s2.0-41149137601