%0 Journal Article %A Yu. Yu. Kochetkov %T A dynamical system in the space of convex quadrangles %J Fundamentalʹnaâ i prikladnaâ matematika %D 2024 %P 183-188 %V 25 %N 2 %U http://geodesic.mathdoc.fr/item/FPM_2024_25_2_a8/ %G ru %F FPM_2024_25_2_a8