%0 Journal Article %A A. V. Blank %A N. A. Sukhareva %T Spatial differential analysis of the intensity distribution for a collimated wave beam %J Numerical methods and programming %D 2020 %P 13-26 %V 21 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMP_2020_21_1_a1/ %G ru %F VMP_2020_21_1_a1