Cita APA (7th ed.)

Mumpar-Victoria, M. R. L. (1999). Perturbations of a Class of ordinary differential expressions preserving the essential spectrum and the nullities. Science Diliman.

Cita Chicago (17th ed.)

Mumpar-Victoria, Marie Redina L. "Perturbations of a Class of Ordinary Differential Expressions Preserving the Essential Spectrum and the Nullities." Science Diliman 1999.

Cita MLA (9th ed.)

Mumpar-Victoria, Marie Redina L. "Perturbations of a Class of Ordinary Differential Expressions Preserving the Essential Spectrum and the Nullities." Science Diliman, 1999.