“…In exited bibliometric analyses, the analyzed aspects usually covering languages (Alfaraz & Calvino, 2004;Chiu & Ho, 2007;Ferrara, 2011), annual publication outputs (Chiu & Ho, 2007;Tsay, 2008), journals (Schubert et al, 1989;Tsay, 2008), categories (Moed et al, 1995;Yamazaki, 1994), and contributing countries and institutions (Schubert et al, 1989;Chiu & Ho, 2007;Tanaka & Ho, 2011;Li et al, 2011). In recent years, author keywords which could provide a reasonably detailed picture of the article's subject (Garfield, 1990), have been quantitatively analyzed to figure out the research emphases and trends (Chiu & Ho, 2007;Fu et al, 2010;Li et al, 2011). To analyze these aspects, the common evaluation indicators number of publications and their publication share were utilized (Schubert et al, 1989;Rehn et al, 2007).…”