Paying for bmj.com: is this measure scientific literature's half open sesame?
Tam, Clarence C;
Lopman, Ben A;
Handan, Dina;
(2003)
Paying for bmj.com: is this measure scientific literature's half open sesame?
BMJ, 327 (7427).
1347-.
ISSN 1468-5833
DOI: https://doi.org/10.1136/bmj.327.7427.1347-d
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