TY  - JOUR
AU  - Jan Bochenek
TI  - Oscillation theorems and nodes of eigenfunctions of certain differential equations of the fourth order
JO  - Annales Polonici Mathematici
PY  - 1972
SP  - 21
EP  - 28
VL  - 27
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-27-1-21-28/
DO  - 10.4064/ap-27-1-21-28
LA  - en
ID  - 10_4064_ap_27_1_21_28
ER  -