@article{JSFU_2011_4_2_a13,
     author = {Vladimir M. Sadovskii},
     title = {Conditions for convexity of the isotropic function of the second-rank tensor},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {265--272},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2011_4_2_a13/}
}