TY - JOUR AU - O. Kovalev AU - V. Kuzkin TI - Analytical expressions for bulk moduli and frequencies of volumetrical vibrations of fullerenes C$_{20}$ and C$_{60}$ JO - Nanosistemy: fizika, himiâ, matematika PY - 2011 SP - 65 EP - 70 VL - 2 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/NANO_2011_2_2_a5/ LA - en ID - NANO_2011_2_2_a5 ER -