@article{VMUMM_2011_4_a6,
     author = {V. G. Vil'ke and I. L. Shapovalov},
     title = {Self-oscillations of two bodies in the case of nonlinear friction},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {39--45},
     publisher = {mathdoc},
     number = {4},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2011_4_a6/}
}