Kilicman, A., & Eltayeb, H. (2008). A note on the classifications of hyperbolic and elliptic equations with polynomial coefficients. Elsevier.
Chicago Style (17th ed.) CitationKilicman, Adem, and Hassan Eltayeb. A Note on the Classifications of Hyperbolic and Elliptic Equations with Polynomial Coefficients. Elsevier, 2008.
MLA (9th ed.) CitationKilicman, Adem, and Hassan Eltayeb. A Note on the Classifications of Hyperbolic and Elliptic Equations with Polynomial Coefficients. Elsevier, 2008.
Warning: These citations may not always be 100% accurate.