TY  - JOUR
AU  - Yu. S. Ilyashenko
TI  - Algebraic nonsolvability and almost algebraic solvability of the centerfocus problem
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1972
SP  - 30
EP  - 37
VL  - 6
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1972_6_3_a4/
LA  - ru
ID  - FAA_1972_6_3_a4
ER  -