H. Grassmann; F. Bet; G. Cabras; M. Ceschia; D. Cobai; C. DelPapa (2003). "A partially static turbine—first experimental results". Renewable Energy. 28 (11): 1779–1785. Bibcode:2003REne...28.1779G. doi:10.1016/S0960-1481(03)00061-2.
H. Grassmann; F. Bet; G. Cabras; M. Ceschia; D. Cobai; C. DelPapa (2003). "A partially static turbine—first experimental results". Renewable Energy. 28 (11): 1779–1785. Bibcode:2003REne...28.1779G. doi:10.1016/S0960-1481(03)00061-2.