Citation network
Citation Network is a Social network which contains paper sources and linked by co-citation relationships. Egghe & Rousseau once (1990, p. 228) explain “when a document di cites a document dj, we can show this by an arrow going from the node representing di to the document representing dj. In this way the documents from a collection D form a directed graph, which is called a ‘citation graph’ or ‘citation network’”.