@book{755161,
	author = {Gohberg, Israel  and Goldberg, Seymour },
	title = {Classes of linear operators },
	publisher = {Springer},
	year = {1990},
	series = {Operator theory: Advances and applications},
	address = {Switzerland},
	note = {Operator theory: Advances and applications - Vol. 49},
	url = {https://doi.org/10.1007/978-3-0348-7509-7}
}