TY  - JOUR
AU  - Vlček, Vladimír
TI  - On the focal points of solutions of a certain fourth order differential equation
JO  - Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
PY  - 1986
SP  - 97
EP  - 115
VL  - 25
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AUPO_1986__25_1_a5/
LA  - en
ID  - AUPO_1986__25_1_a5
ER  -