%0 Journal Article %A Yu. M. Kovalev %T Analysis of some approximation for the description of thermal side of the equation states of molecular crystals %J Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematika, mehanika, fizika %D 2017 %P 49-56 %V 9 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/VYURM_2017_9_1_a5/ %G ru %F VYURM_2017_9_1_a5