@article{202110.0389,
	doi = {10.20944/preprints202110.0389.v1},
	url = {https://doi.org/10.20944/preprints202110.0389.v1},
	year = 2021,
	month = {October},
	publisher = {Preprints},
	author = {Boris Averbukh},
	title = {A Formalization of the Concept of a Numeral System},
	journal = {Preprints}
}