TY  - JOUR
AU  - Zofia Szmydt
TI  - On the degree of regularity of surfaces formed by the asymptotic integrals of differential equations
JO  - Annales Polonici Mathematici
PY  - 1955
SP  - 294
EP  - 313
VL  - 2
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-2-2-294-313/
DO  - 10.4064/ap-2-2-294-313
LA  - en
ID  - 10_4064_ap_2_2_294_313
ER  -