Dear editor,
Wikipedia is a free-access and web-based multilingual encyclopedia that voluntaries from all around the world can write and edit.Previous studies on Wikipedia mainly focused on its collaborative systems,i.e.,edit patterns [1,2].Besides the relation network of editors in Wikipedia,the articles of Wikipedia form a large-scale complex network,the Wikipedia article reference network (WARN).Articles are regarded as nodes,which are connected by the URL links.Gabrilovich and Markovitch [3] applied the machine learning techniques to explore the semantic relatedness of natural language texts with the concepts derived from Wikipedia.Medelyan et al.[4] designed an algorithm for the topic indexing with Wikipedia,which contains many article synonyms.