@article{SM_1984_47_2_a7,
     author = {A. N. Zhernak},
     title = {Analytic solution of a class of optimization problems},
     journal = {Sbornik. Mathematics},
     pages = {391--396},
     publisher = {mathdoc},
     volume = {47},
     number = {2},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1984_47_2_a7/}
}