@article{FPM_2013_18_5_a4,
     author = {G. E. Ivanov and M. S. Lopushanski},
     title = {Well-posedness of approximation and optimization problems for weakly convex sets and functions},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {89--118},
     publisher = {mathdoc},
     volume = {18},
     number = {5},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2013_18_5_a4/}
}