@incollection{MEM_2021_50_a25,
     author = {Boykina, Dobrinka},
     title = {On the process of understanding in mathematics education},
     booktitle = {},
     series = {Mathematics and Education in Mathematics},
     pages = {222--229},
     year = {2021},
     volume = {50},
     language = {bg},
     url = {http://geodesic.mathdoc.fr/item/MEM_2021_50_a25/}
}