TY  - JOUR
AU  - N. P. Erugin
TI  - The analytic theory and problems in the real theory of differential equations, connected with the first method and with methods of the analytic theory
JO  - Differencialʹnye uravneniâ
PY  - 1967
SP  - 1821
EP  - 1863
VL  - 3
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1967_3_11_a1/
LA  - ru
ID  - DE_1967_3_11_a1
ER  -