Paper  bibtex   

@misc{heatstore_high_2021,
	title = {{HIGH} {TEMPERATURE} {UNDERGROUND} {THERMAL} {ENERGY} {STORAGE} ({HT}-{UTES})},
	url = {https://www.heatstore.eu/documents/2021.10.27_HEATSTORE_GEUS_Heatstorage%20potential%20and%20UTES%20Roadmap.pdf},
	author = {HEATSTORE},
	year = {2021},
}