TY  - JOUR
AU  - JAAK PEETRE
TI  - A generalization of Courant's nodal domain theorem..
JO  - Mathematica Scandinavica
PY  - 1957
SP  - 15
EP  - 20
VL  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1957__5_165645/
ID  - MS2_1957__5_165645
ER  -