%0 Journal Article %A A. Badalyan %A P. Mantashyan %A V. Mekhitaryan %A V. Nersesyan %A R. Drampyan %T Optical induction of 3D refractive lattices in doubly doped LiNbO$_{3}$ photorefractive crystal %J Nanosistemy: fizika, himiâ, matematika %D 2014 %P 210-216 %V 5 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/NANO_2014_5_2_a0/ %G en %F NANO_2014_5_2_a0