TY  - JOUR
AU  - V. I. Vasyunin
AU  - N. K. Nikol'skii
TI  - Classification of $H^2$-functions according to the degree of their cyclicity
JO  - Izvestiya. Mathematics 
PY  - 1984
SP  - 225
EP  - 242
VL  - 23
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1984_23_2_a1/
LA  - en
ID  - IM2_1984_23_2_a1
ER  -