SpringerLink (Online service) & Sario, L. (1977). Classification theory of Riemannian manifolds: Harmonic, quasiharmonic, and biharmonic functions. Springer-Verlag.
Chicago Style (17th ed.) CitationSpringerLink (Online service) and Leo Sario. Classification Theory of Riemannian Manifolds: Harmonic, Quasiharmonic, and Biharmonic Functions. Berlin ; New York: Springer-Verlag, 1977.
MLA (9th ed.) CitationSpringerLink (Online service) and Leo Sario. Classification Theory of Riemannian Manifolds: Harmonic, Quasiharmonic, and Biharmonic Functions. Springer-Verlag, 1977.
Warning: These citations may not always be 100% accurate.