%0 Journal Article %A A. A. Bityurin %T Mathematical modelling of critical speed of the multistage core at longitudinal blow %J Izvestiya of Saratov University. Mathematics. Mechanics. Informatics %D 2012 %P 56-62 %V 12 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/ISU_2012_12_1_a8/ %G ru %F ISU_2012_12_1_a8