Table 1.

Metrics of the 10 largest clusters identified by computing the Document Co-Citation Analysis (DCA).

Cluster ID	Size	Silhouette	Mean Year
0	190	0.879	2010
1	129	0.885	2002
2	115	0.902	1994
4	69	0.915	1990
6	50	0.968	2014
7	41	0.966	2001
8	39	0.983	2004
9	36	0.99	2014
10	29	0.989	1987
11	27	0.983	1987