Yi-Hui Chen Eric Jui-Lin Lu Meng-Fang Tsai Finding keywords in blogs: Efficient keyword extraction in blog mining via user behaviors. 663-670 2014 41 Expert Syst. Appl. 2 https://doi.org/10.1016/j.eswa.2013.07.091 db/journals/eswa/eswa41.html#ChenLT14