%0 Journal Article %A K. A. Bzheumikhov %A Z. Ch. Margushev %A Yu. V. Savoiskii %T Fiber with negative curvature of the hollow core of polymeric material: production and research of optical properties %J News of the Kabardin-Balkar scientific center of RAS %D 2015 %P 7-12 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/IZKAB_2015_5_a0/ %G ru %F IZKAB_2015_5_a0