TY  - JOUR
AU  - V. N. Popov
AU  - S. A. Fedotov
TI  - The diagram technique for ferromagnetic systems with spin 1/2
JO  - Informatics and Automation
PY  - 1990
SP  - 159
EP  - 169
VL  - 184
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1990_184_a4/
LA  - ru
ID  - TRSPY_1990_184_a4
ER  -