@article{MZM_2007_81_1_a5,
     author = {V. S. Klimov},
     title = {Deformations of {Functionals} and {Bifurcations} of {Extremals}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {70--82},
     publisher = {mathdoc},
     volume = {81},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2007_81_1_a5/}
}