@article{TM_1987_180_a78,
     author = {A. I. Kosolap},
     title = {Superconvex functions and multiextremal problems},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {139--140},
     publisher = {mathdoc},
     volume = {180},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1987_180_a78/}
}