Gruther W, Wick F, Paul B, Leitner C, Posch M, Matzner M, Crevenna R, Ebenbichler G. Diagnostic accuracy and reliability of muscle strength and endurance measurements in patients with chronic low back pain. JRM [Internet]. 2009 Jun. 14 [cited 2024 Jul. 17];41(8):613-9. Available from: https://medicaljournalssweden.se/jrm/article/view/18046