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  1. Wei, M.; Xu, L.: Boolean mapping algorithms across heterogeneous information sources (1998) 10.31 
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  2. Xu, L.: Research synthesis methods and library and information science : shared problems, limited diffusion (2016) 10.31 
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  3. Xu, L.; Qiu, J.: Unsupervised multi-class sentiment classification approach (2019) 10.31 
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