@article{ND_2015_11_1_a8,
     author = {Valery V. Kozlov},
     title = {Principles of dynamics and servo-constraints},
     journal = {Russian journal of nonlinear dynamics},
     pages = {169--178},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2015_11_1_a8/}
}