@article{VMUMM_2005_4_a6,
     author = {M. V. Deryabin},
     title = {On the possibility of the reduction of systems with servoconstraints to {Langrangian} form},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {30--33},
     publisher = {mathdoc},
     number = {4},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2005_4_a6/}
}