@article{ND_2009_5_4_a2,
     author = {A. P. Ivanov},
     title = {Bifurcations in systems with friction: basic models and methods},
     journal = {Russian journal of nonlinear dynamics},
     pages = {479--498},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2009_5_4_a2/}
}