%0 Journal Article %A M. M. Popov %T Diffraction losses of confocal resonator with mirrors of arbitrary shape %J Doklady Akademii Nauk %D 1974 %P 63-66 %V 219 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1974_219_1_a14/ %G ru %F DAN_1974_219_1_a14