@article{TM_2008_262_a11,
     author = {G. G. Magaril-Il'yaev and V. M. Tikhomirov},
     title = {Newton's {Method,} {Differential} {Equations,} and the {Lagrangian} {Principle} for {Necessary} {Extremum} {Conditions}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {156--177},
     publisher = {mathdoc},
     volume = {262},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2008_262_a11/}
}