A. Oxman, H. Schunemann, and A. Fretheim. Health research policy and systems / BioMed Central, (December 2006)PUBM: Electronic; DEP: 20061208; JID: 101170481; 2006/04/07 received; 2006/12/08 accepted; 2006/12/08 aheadofprint; epublish.
M. Lelgemann, B. Lang, R. Kunz, and G. Antes. Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz, 48 (2):
215-220(02/01 2005)M3: 10.1007/s00103-004-0982-5.