%0 Journal Article %A Zh. S. Takibaev %T On the nature of two-model angular distribution of shower particles in the $10$ -- $20$ Gev energy region %J Doklady Akademii Nauk %D 1969 %P 80-82 %V 186 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1969_186_1_a21/ %G ru %F DAN_1969_186_1_a21