1.
, . Perturbation of spectra in Hilbert space. Providence (R.I.): American Mathematical Society; 1965.
et . Perturbation of spectra in Hilbert space. Providence (R.I.) : American Mathematical Society, 7 mai 1965. ISBN 0-8218-1103-7
Friedrichs Kurt Otto & Summer Seminar on Applied Mathematics. (1965). Perturbation of spectra in Hilbert space. American Mathematical Society.
Style de citation MLA (8e éd.)Friedrichs Kurt Otto et Summer Seminar on Applied Mathematics. Perturbation of Spectra in Hilbert Space. American Mathematical Society, 1965.
Attention : ces citations peuvent ne pas être correctes à 100%.