Leonhardt C, Lehr D, Keller S, Chenot JF, Luckmann J, Basler H-D, Baum E, Donner-Banzhoff N, Pfingsten M, Hildebrandt J, Kochen MM, Becker A (2009) Are fear avoidance beliefs predictors or consequences of physical activity in low back pain patients? A cross-lagged panel analysis. GMS Psychosoc Med 2009; 6:Doc01 DOI: 10.3205/psm000057, URN: urn:nbn:de:0183-psm0000577
van der Giessen RN, Speksnijder CM, Helders PJ. The effectiveness of graded activity in patients with non-specific low-back pain: a systematic review. Disabil Rehabil. 2011 Dec 10. [Epub ahead of print]
Seidler A, Liebers F, Latza U. Prävention von Low-Back-Pain im beruflichen Kontext. Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz 2008; 51(3): 322-333(12)
Giné-Garriga M, Guerra M, Pagès E, Manini TM, Jiménez R, Unnithan VB. The effect of functional circuit training on physical frailty in frail older adults: a randomized controlled trial. J Aging Phys Act. 2010 Oct;18(4):401-24.