@article{SM_2000_191_1_a0,
     author = {A. V. Arutyunov},
     title = {Implicit function theorem as a~realization of {the~Lagrange} principle. {Abnormal} points},
     journal = {Sbornik. Mathematics},
     pages = {1--24},
     publisher = {mathdoc},
     volume = {191},
     number = {1},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2000_191_1_a0/}
}