%0 Journal Article %A V. V. Chistyakov %T On integrating the projectile motion equations of a heavy point in medium with height decreasing density %J Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki %D 2012 %P 120-132 %N 1 %U http://geodesic.mathdoc.fr/item/VUU_2012_1_a9/ %G ru %F VUU_2012_1_a9