%0 Journal Article %A Dragi Radojević %T Eigen values and principal directions of the energy momentum tensor of the ferrofluid %J Theoretical and applied mechanics %D 1981 %P 113 %V 7 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TAM_1981_7_1_a12/ %G en %F TAM_1981_7_1_a12