@article{VTAMU_2023_28_144_a5,
     author = {M. I. Sumin},
     title = {On the role of {Lagrange} multipliers and duality in ill-posed problems for constrained extremum.
},
     journal = {Vestnik rossijskih universitetov. Matematika},
     pages = {414--435},
     publisher = {mathdoc},
     volume = {28},
     number = {144},
     year = {2023},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTAMU_2023_28_144_a5/}
}