Figure 2

Co-citation network of documents (1993–2002). Figure 2 was the time-zone visual network of 200 co-cited articles in psychiatry field from 1993 to 2002 based on 10 one –year slices. The numbers at the top area represented years. There were total 41 purple rings which represented the articles’ centralities more than 0.1.The pivotal-points were identified with representative articles’ authors, publication years and journal titles.