@article{VTAMU_2020_25_131_a6,
     author = {M. I. Sumin},
     title = {Nondifferential {Kuhn--Tucker} theorems in constrained
},
     journal = {Vestnik rossijskih universitetov. Matematika},
     pages = {307--330},
     publisher = {mathdoc},
     volume = {25},
     number = {131},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTAMU_2020_25_131_a6/}
}