TY  - JOUR
AU  - A. D. Myshkis
AU  - L. È. Èl'sgol'ts
TI  - Some results and problems in the theory of differential equations
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1967
SP  - 19
EP  - 57
VL  - 22
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1967_22_2_a1/
LA  - en
ID  - RM_1967_22_2_a1
ER  -