%0 Journal Article %A V. V. Vavilov %A A. V. Ustinov %T Problems on Lattices %J Matematičeskoe obrazovanie %D 2006 %P 47-67 %V 39 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MO_2006_39_4_a7/ %G ru %F MO_2006_39_4_a7