@article{DAN_1990_314_1_a20,
     author = {I. A. Kuzin},
     title = {A variational method for determining the critical points of a},
     journal = {Doklady Akademii Nauk},
     pages = {85--88},
     publisher = {mathdoc},
     volume = {314},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_314_1_a20/}
}