@article{VUU_2010_4_a5,
     author = {V. V. Vaskin and O. S. Naymushina},
     title = {The motion of a~flat rigid disks bouncing off of a~smooth horizontal plane in the gravity field},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {49--60},
     year = {2010},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2010_4_a5/}
}