@book{23377,
	author = {Renardy, Michael},
	title = {An Introduction to Partial Differential Equations},
	publisher = {Springer Publishing Company},
	year = {2004},
	address = {New York},
	edition = {2nd},
	url = {https://libgen.is/book/index.php?md5=97F0CF23E7229654916DA6CA61C6D2C2}
}