TY  - JOUR
AU  - Y.W. Chen
TI  - HOELDER continuity and initial value problems of mixed type differential equations.
JO  - Commentarii mathematici Helvetici
PY  - 1959
SP  - 296
EP  - 321
VL  - 33
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1959__33_139177/
ID  - CMH_1959__33_139177
ER  -