@article{202105.0280,
	doi = {10.20944/preprints202105.0280.v1},
	url = {https://doi.org/10.20944/preprints202105.0280.v1},
	year = 2021,
	month = {May},
	publisher = {Preprints},
	author = {Anna Ziobro and Rafał Blazy},
	title = {Polycentricity of the City's Metropolitan System as a Factor Increasing Security in Times of Danger - On the Example of Cracow},
	journal = {Preprints}
}