@book{20866,
	author = {Wörndl, Wolfgang||Koo, Chulmo||Stienmetz, Jason L.},
	title = {Information and Communication Technologies in Tourism 2021},
	url = {https://library.oapen.org/bitstream/20.500.12657/46110/1/2021_Book_InformationAndCommunicationTec.pdf}
}