%0 Journal Article %A Pashev, George %A Doneva, Rositsa %A Gaftandzhieva, Silvia %T An application of accumulative frame models in programming training %J Mathematics and Education in Mathematics %D 2021 %P 284-289 %V 50 %I mathdoc %U http://geodesic.mathdoc.fr/item/MEM_2021_50_a33/ %G bg %F MEM_2021_50_a33