@article{TM_1975_134_a15,
     author = {J. Ne\v{c}as},
     title = {An approximate method for finding the critical points of even functionals},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {235--239},
     publisher = {mathdoc},
     volume = {134},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1975_134_a15/}
}