@article{MZM_1977_21_2_a10,
     author = {M. F. Sukhinin},
     title = {A~weakened variant of the law of {Lagrange} multipliers in {a~Banach} space},
     journal = {Matemati\v{c}eskie zametki},
     pages = {223--228},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_21_2_a10/}
}