Z. S. Oulhaci, O. Imine, O. Ladjedel, T. Yahiaoui, L. Adjlout, and O. Šikula, “EXPERIMENTAL PERFORMANCE ANALYSIS OF BIPLANE VAWT CONFIGURATIONS”, JAES, vol. 15, no. 4, Dec. 2017, doi: 10.5937/jaes15-13690.