@article{TIMM_2012_18_4_a15,
     author = {A. V. Efimov},
     title = {An analog of {Rudin's} theorem for continuous radial positive definite functions of several variables},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {172--179},
     year = {2012},
     volume = {18},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2012_18_4_a15/}
}