TY  - JOUR
AU  - S. V. Matveev
TI  - Structure of the second homotopy group of the union of two spaces
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1985
SP  - 147
EP  - 155
VL  - 143
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1985_143_a7/
LA  - ru
ID  - ZNSL_1985_143_a7
ER  -