Matthias Egger

Systematic reviews in health care: Investigating and dealing with publication and other biases in meta-analysis.

Jonathan A C Sterne, George Davey Smith, J. Sterne, 2001, BMJ.

Meta-analysis: Principles and procedures

George Davey Smith, G. Smith, A. Phillips, 1997, BMJ.

Early enteral feeding versus “nil by mouth” after gastrointestinal surgery: systematic review and meta-analysis of controlled trials

Stephen J Lewis, M. Egger, P. Sylvester, 2001, BMJ : British Medical Journal.

Systematic reviews in health care: Assessing the quality of controlled clinical trials.

Douglas G Altman, Peter Jüni, D. Altman, 2001, BMJ.