@article{IVM_1972_5_a15,
     author = {\`E. V. Chelidze},
     title = {Generalization of certain theorems of {Karamata} to the case of functions of two variables},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {109--115},
     publisher = {mathdoc},
     number = {5},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1972_5_a15/}
}