1.
Singular perturbations. Amsterdam [etc.]: North Holland; 1990.
Singular perturbations. Amsterdam [etc.] : North Holland, 18 mai 1990. ISBN 0-444-88134-4
Frank Leonid S. (1990). Singular perturbations: I Spaces and singular perturbations on manifolds without boundary. North Holland.
MLA (8th ed.) CitationFrank Leonid S. Singular Perturbations: I Spaces and Singular Perturbations on Manifolds Without Boundary. North Holland, 1990.
Warning: These citations may not always be 100% accurate.