Mumpar-Victoria, M. R. L. (1999). Essential spectrum and millities of a class of special expressions. Matimya's Matematika.
Lua i Stíl Chicago (17ú heag.)Mumpar-Victoria, Marie Redina L. "Essential Spectrum and Millities of a Class of Special Expressions." Matimya's Matematika 1999.
Lua MLA (9ú heag.)Mumpar-Victoria, Marie Redina L. "Essential Spectrum and Millities of a Class of Special Expressions." Matimya's Matematika, 1999.
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