%0 Journal Article %A V. A. Levin %A A. A. Sorokin %A A. M. Starik %T On mechanisms of self-focusing during the propagation of laser radiation with wavelength $\lambda_I\approx2{,}8$ mkm in humid atmosphere %J Doklady Akademii Nauk %D 1989 %P 1073-1077 %V 304 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1989_304_5_a10/ %G ru %F DAN_1989_304_5_a10