@article{VTAMU_2022_27_137_a4,
     author = {M. I. Sumin},
     title = {On ill-posed problems, extremals of the {Tikhonov} functional and the regularized {Lagrange} principles},
     journal = {Vestnik rossijskih universitetov. Matematika},
     pages = {58--79},
     publisher = {mathdoc},
     volume = {27},
     number = {137},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTAMU_2022_27_137_a4/}
}