Cita APA

Friedrichs, K. O. 1. (1965). Perturbation of spectra in Hilbert space. American Mathematical Society.

Citación estilo Chicago

Friedrichs, K. O. 1901-. Perturbation of Spectra in Hilbert Space. Providence, R. I.: American Mathematical Society, 1965.

Cita MLA

Friedrichs, K. O. 1901-. Perturbation of Spectra in Hilbert Space. Providence, R. I.: American Mathematical Society, 1965.