@article{ND_2008_4_3_a3,
     author = {A. P. Ivanov},
     title = {Geometric representation of detachment conditions in systems with unilateral constraints},
     journal = {Russian journal of nonlinear dynamics},
     pages = {303--312},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2008_4_3_a3/}
}