APA (7th ed.) Citation

Groen, P. P. d. (1978). Singular perturbations of spectra (Preprint.).

Chicago Style (17th ed.) Citation

Groen, P. P.&nsb;de&nse de. Singular Perturbations of Spectra. Preprint. Amsterdam, 1978.

MLA (9th ed.) Citation

Groen, P. P.&nsb;de&nse de. Singular Perturbations of Spectra. Preprint. 1978.

Warning: These citations may not always be 100% accurate.