TY  - BOOK
AU  - Sario, Leo and Others
AU  - 
TI  - Classification theory of Riemannian manifolds; harmonic, quasiharmonic and biharmonic functions
T2  - Lecture notes in Mathematics
U1  - 516 
PY  - 1977///
CY  - Berlin
PB  - Springer-Verlag
ER  -