For citations:
Golubeva I.U., Tikhonravov D.L., Voitenkov V.B., Pashkov A.Y., Pervunina T.M. Сomparative study of the formation of concepts using real geometric figures and contour images as stimuli in children at the age of 4 to 5 years. Translational Medicine. 2020;7(5):109-118. (In Russ.) https://doi.org/10.18705/2311-4495-2020-7-5-109-118