@book{90127,
	author = {Sayas, Francisco-Javier, and Brown, Thomas S.},
	title = {Variational techniques for elliptic partial differential equations :},
	publisher = {CRC Press,},
	year = {[2019]},
	address = {Boca Raton, Florida :},
	url = {https://www.taylorfrancis.com/books/9780429507069}
}