%0 Journal Article %A G. A. Yakovlev %A M. Ch. Zulu %T Distortion of the radiation background of the urban environment due to the aggressive influence of the technosphere. stage 2: parks and recreation areas %J Vestnik KRAUNC. Fiziko-matematičeskie nauki %D 2020 %P 231-238 %V 33 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/VKAM_2020_33_4_a19/ %G ru %F VKAM_2020_33_4_a19