Paying for bmj.com: is this measure scientific literature's half open sesame?

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