TY  - JOUR
AU  - Rolf Pütter
TI  - On the nodal lines of second eigenfunctions of the fixed membrane problem.
JO  - Commentarii mathematici Helvetici
PY  - 1990
SP  - 96
EP  - 103
VL  - 65
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1990__65_3_140185/
ID  - CMH_1990__65_3_140185
ER  -