@article{202103.0748,
	doi = {},
	url = {https://doi.org/},
	year = 2021,
	month = {March},
	publisher = {Preprints},
	author = {Ágoston Restás and István Szalkai and Gyula Óvári},
	title = {Drone Application for Spraying Disinfection Liquid Fighting against Covid-19 Pandemic – Theoretic Approach},
	journal = {Preprints}
}