Contribution of Maxwell stress in air on the deformations of induction machinesFonteyn, Katarzyna Anna; Belahcen, Anouar; Rasilo, Paavo; Kouhia, Reijo; Arkkio, AnteroJournal of electrical engineering and technology2012 / p. 336-341 : ill https://ieeexplore.ieee.org/document/5664487