Mapping Science - Mapping Scientific Frontiers: The Quest for Knowledge Visualization - page 295

Fig. 8.13 Red dots are retracted articles. Labeled ones are highly cited. Clusters are formed by
co-citation strengths
Fig. 8.14 An extensive citation context of a retracted 2003 article by Nakao et al. The co-citation
network contains 27,905 cited articles between 2003 and 2011. The black dot in the middle of
the dense network represents the Nakao paper. Red dots represent 340 articles that directly cited
the Nakao paper (there are 609 such articles in the Web of Science). Cyan dots represent 2,130 of
the 9,656 articles that bibliographically coupled with the direct citers
they have at least one common references with the 609 direct citing articles. Top
6,000 most cited references per year between 2003 and 2011 were chosen to form
a co-citation network of 27,905 references and 2,162,018 co-citation links. The
retracted Nakao paper is shown as the black dot in the middle of the map. The red