Science, Vol. 321, No. 5887. (18 July 2008), pp. 395-399.
PLoS ONE, Vol. 3, No. 7. (2 July 2008), e2512.
Journal of Zhejiang University - Science B, Vol. 9, No. 7. (1 July 2008), pp. 582-590.
Scientometrics, Vol. 30, No. 1. (26 May 1994), pp. 175-186.
Bulletin of the Medical Library Association, Vol. 76, No. 1. (January 1988), pp. 14-21.
Issues in Science and Technology Librarianship, No. 46. (Spring 2006)
Scientometrics, Vol. 76, No. 1. (16 July 2008), pp. 125-133.
Journal of the American Society for Information Science and Technology, Vol. 59, No. 9. (2008), pp. 1366-1382.
Journal of the American Society for Information Science and Technology, Vol. 59, No. 9. (2008), pp. 1393-1408.
Journal of the American Society for Information Science and Technology, Vol. 59, No. 9. (2008), pp. 1433-1440.
Journal of the American Society for Information Science and Technology, Vol. 59, No. 9. (2008), pp. 1513-1522.
BMC Med, Vol. 1 (24 November 2003)
Seminars in thrombosis and hemostasis, Vol. 34, No. 1. (February 2008), pp. 7-25.
Journal of Microbiology, Immunology and Infection, Vol. 39, No. 6. (December 2006), pp. 436-443.
Journal of the American Society for Information Science & Technology, Vol. 56, No. 7. (20050501)
Quality & Quantity, Vol. 42, No. 2. (20080401)
Journal of the American Society for Information Science & Technology, Vol. 55, No. 5. (20040301)
portal: Libraries & the Academy, Vol. 5, No. 1. (20050101)
Science & Technology Libraries, Vol. 25, No. 3. (20050101)
BMJ: British Medical Journal, Vol. 7593 (20070317)
BMJ: British Medical Journal, Vol. 7593 (20070317)
Journal of the American Society for Information Science & Technology, Vol. 58, No. 8. (20070601)
Journal of the American Society for Information Science & Technology, Vol. 58, No. 10. (20070801)
Journal of the American Society for Information Science & Technology, Vol. 59, No. 5. (20080301)
Epidemiologic Perspectives & Innovations, Vol. 5 (26 February 2008), 3.
Journal of the American Society for Information Science and Technology, Vol. 58, No. 14. (2007), pp. 2167-2179.
Rev Saude Publica, Vol. 40 Spec no. (August 2006), pp. 50-56.
Information Processing & Management, Vol. 42, No. 3. (May 2006), pp. 785-804.