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Sterne, J. AC, et al. “Recommendations for Examining and Interpreting Funnel Plot Asymmetry in Meta-Analyses of Randomised Controlled Trials.” BMJ (Online), vol. 343, no. 7818, 2011.

Sterne, JAC, AJ Sutton, JPA Ioannidis, N Terrin, DR Jones, J Lau, J Carpenter, et al. 2011. “Recommendations for Examining and Interpreting Funnel Plot Asymmetry in Meta-Analyses of Randomised Controlled Trials.” BMJ (Online) 343 (7818).