@article{202012.0292,
	doi = {10.20944/preprints202012.0292.v1},
	url = {https://doi.org/10.20944/preprints202012.0292.v1},
	year = 2020,
	month = {December},
	publisher = {Preprints},
	author = {Galina Portnova and Anna Rebreikina and Olga Martynova},
	title = {The Ages of Zone of Proximal Development for Retrospective Time Assessment and Anticipation of Time Event},
	journal = {Preprints}
}