?url_ver=Z39.88-2004&rft_id=10.1007%2F978-3-030-41964-6_50&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Nguyen%2C+Thi+Cham&rft.aulast=Nguyen&rft.aufirst=Thi+Cham&rft.date=4+March+2020&rft.issn=0302-9743&rft.title=A+Lifelong+Sentiment+Classification+Framework+Based+on+a+Close+Domain+Lifelong+Topic+Modeling+Method&rft.btitle=Intelligent+Information+and+Database+Systems&rft.genre=proceeding