@article{202101.0308,
	doi = {},
	url = {https://doi.org/},
	year = 2021,
	month = {January},
	publisher = {Preprints},
	author = {Sergio López-García and Jaime Muriel-Isidro and Brais Ruibal-Lista and Rubén Maneiro and Mario Amatria-Jiménez and José E. Moral-García},
	title = {Trail-Running, Skyrunning and Mountain Running: Organizational Structures of Modalities},
	journal = {Preprints}
}