%0 Journal Article %A G. A. Klekovkin %T Modeling the contours of plant leaves in the GeoGebra environment %J Matematičeskoe obrazovanie %D 2021 %P 5-17 %N 2 %U http://geodesic.mathdoc.fr/item/MO_2021_2_a1/ %G ru %F MO_2021_2_a1