“…In addition, citation graphs provide useful statistical information. For example, a set of journal/proceedings (or authors) can be grouped by using clustering algorithms (Biryukov & Dong, 2010;Zaane, Chen, & Goebel, 2009;Zhou, Ji, Zha, & Giles, 2006). Another branch of previous work focuses on finding the most important journal/proceedings (or authors) in the sense of citation (Nerur, Sikora, Mangalaraj, & Balijepally, 2005;Yan & Lee, 2007).…”