%0 Journal Article %A Nguyen van Hieu %A Nguyen ai Viet %T Three-branche excitonic polaritons in direct band gap cubic %J Doklady Akademii Nauk %D 1989 %P 608-610 %V 305 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1989_305_3_a22/ %G ru %F DAN_1989_305_3_a22