%0 Journal Article %A O. Kovalev %A V. Kuzkin %T Analytical expressions for bulk moduli and frequencies of volumetrical vibrations of fullerenes C$_{20}$ and C$_{60}$ %J Nanosistemy: fizika, himiâ, matematika %D 2011 %P 65-70 %V 2 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/NANO_2011_2_2_a5/ %G en %F NANO_2011_2_2_a5