@article{VUU_2012_1_a9,
     author = {V. V. Chistyakov},
     title = {On integrating the projectile motion equations of a~heavy point in medium with height decreasing density},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {120--132},
     publisher = {mathdoc},
     number = {1},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2012_1_a9/}
}