@book{100678,
	author = {Unamuno, Miguel de,},
	title = {Del sentimiento trágico de la vida},
	publisher = {Project Gutenberg,},
	year = {2019},
	address = {Salt Lake City, UT :},
	note = {Wikipedia page about this book: https://es.wikipedia.org/wiki/Del_sentimiento_tr%C3%A1gico_de_la_vida},
	url = {https://www.gutenberg.org/ebooks/59852}
}