%0 Journal Article %A A. Ya. Helemskii %T Nonmatricial Version of the Arveson--Wittstock Extension Principle, and Its Generalization %J Funkcionalʹnyj analiz i ego priloženiâ %D 2008 %P 63-70 %V 42 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_2008_42_3_a5/ %G ru %F FAA_2008_42_3_a5