@incollection{MEM_2020_49_a31,
     author = {Chehlarova, Toni},
     title = {Studying stereometry with dynamic constructions},
     booktitle = {},
     series = {Mathematics and Education in Mathematics},
     pages = {269--274},
     year = {2020},
     volume = {49},
     language = {bg},
     url = {http://geodesic.mathdoc.fr/item/MEM_2020_49_a31/}
}