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2. Collaborative research: accomplishments & potential;Katsouyanni K;Environ Health,2008
3. Reflections on scientific collaboration (and its study): past, present, and future;Beaver DD;Scientometrics,2001
4. National characteristics in international scientific co-authorship relations;Glänzel W;Scientometrics,2001
5. International activity in the Cochrane Collaboration with particular reference to India;Allen C;Natl Med J India,2007