“…In their seminal article, "Improving retrieval performance by relevance feedback", Salton and Buckley (1990) (Kaptein & Kamps, 2011;Xu, Luo, Yu, & Xu, 2011;Hamdi, 2011;Li, Otsuka, & Kitsuregawa, 2010;Fu, 2010;Gabrilovich et al, 2009;Nauer & Toussaint, 2009;Yumoto, Mori, & Sumiya, 2009;Kuppusamy & Aghila, 2009), Web commerce (Verma, Tiwari, & Mishra, 2011), Web 2.0 RSS feed content (Teng, Liu, & Ren, 2010), and multilingual IR (He & Wu, 2011;He, Tu, Luo, & Li, 2009;). …”