%0 Journal Article %A Vladimir M. Sadovskii %T Conditions for convexity of the isotropic function of the second-rank tensor %J Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika %D 2011 %P 265-272 %V 4 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/JSFU_2011_4_2_a13/ %G ru %F JSFU_2011_4_2_a13