TY  - JOUR
AU  - K. A. Mikhailova
TI  - The occurrence problem for free products of groups
JO  - Sbornik. Mathematics
PY  - 1968
SP  - 181
EP  - 190
VL  - 4
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1968_4_2_a3/
LA  - en
ID  - SM_1968_4_2_a3
ER  -