@article {1500,
	title = {COVER},
	journal = {Problems of Education in the 21st Century},
	volume = {79},
	year = {2021},
	month = {December/2021},
	pages = {Continuous},
	type = {Other},
	chapter = {831-832},
	abstract = {Cover page, Vol. 79, No. 6, 2021, PEC},
	keywords = {cover page},
	issn = {1822-7864},
	url = {http://oaji.net/articles/2021/457-1639553519.pdf},
	author = {Editorial Board}
}
