@book{15807,
	author = {Kreyszig, erwin},
	title = {Advanced engineering mathematics},
	publisher = {John Wiley & Sons Publisher},
	year = {2013},
	address = {New Delhi},
	edition = {9th},
	url = {https://libgen.is/book/index.php?md5=7F080EBBEA2790D0E681A773FD755ECF}
}