Katō, T. (1966). Perturbation theory for linear operators. Springer.
Cita Chicago (17th ed.)Katō, Tosio. Perturbation Theory for Linear Operators. Berlin: Springer, 1966.
Cita MLA (8th ed.)Katō, Tosio. Perturbation Theory for Linear Operators. Springer, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.