@book{356252,
	author = {Georgiev, Svetlin,},
	title = {Focus on calculus /},
	publisher = {Nova Science Publishers,},
	year = {[2020]},
	series = {Mathematics research developments},
	address = {New York :},
	url = {https://ebookcentral.proquest.com/lib/kuct-ebooks/detail.action?docID=6119464}
}