Table 5.

Bibliographic coupling of countries.

S.No	Country	Documents	Citations	Citations per document	Total link strength
1	USA	960	46,546	48.4	746,620
2	Netherlands	321	17,263	53.8	357,405
3	UK	396	14,614	36.9	355,592
4	Canada	242	8325	34.4	242,865
5	Australia	241	10,842	45	240,015
6	Spain	142	8446	59.5	206,626
7	Peoples R China	213	6864	32.2	200,852
8	Germany	168	10,852	64.6	198,838
9	Italy	88	5787	65.8	143,044
10	Japan	68	3881	57.1	111,198