TY  - JOUR
AU  - S. P. Hastings
TI  - On the existence of a solution of a system ẋ= f(t, x) which remains in a given set
JO  - Annales Polonici Mathematici
PY  - 1967
SP  - 201
EP  - 205
VL  - 19
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-19-2-201-205/
DO  - 10.4064/ap-19-2-201-205
LA  - en
ID  - 10_4064_ap_19_2_201_205
ER  -