TY - JOUR AU - V. E. Kholodovsky AU - I. O. Machikhina TI - Long-waves principle and phonon spectra of cubic crystal lattices JO - Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematika, mehanika, fizika PY - 2009 SP - 97 EP - 104 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VYURM_2009_1_a16/ LA - ru ID - VYURM_2009_1_a16 ER -