Measurement of the strong coupling αs from the four-jet rate in e+e- annihilation using JADE dataJ. Schieck, S. Bethke, O. Biebel, S. Kluth, P.A. Movilla Fernández, C. Pahl and The JADE CollaborationEur. Phys. J. C, 50 3 (2007) 769DOI: https://doi.org/10.1140/epjc/s10052-007-0226-6