@article{DM_1990_2_1_a13,
     author = {M. M. Kovalev and A. V. Moshchenskii},
     title = {An optimal search for extrema of convex functions on lattices},
     journal = {Diskretnaya Matematika},
     pages = {130--141},
     year = {1990},
     volume = {2},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1990_2_1_a13/}
}