%0 Journal Article %A A. G. Sukhonos %T A cohomological characteristic for the length and width of a partially ordered set %J Fundamentalʹnaâ i prikladnaâ matematika %D 2009 %P 217-227 %V 15 %N 7 %U http://geodesic.mathdoc.fr/item/FPM_2009_15_7_a10/ %G ru %F FPM_2009_15_7_a10