%0 Journal Article %A V. F. Lazutkin %T Diffraction losses in open resonators. A geometric approach %J Doklady Akademii Nauk %D 1981 %P 1089-1092 %V 258 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_258_5_a15/ %G ru %F DAN_1981_258_5_a15