Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1990_184_a4, author = {V. N. Popov and S. A. Fedotov}, title = {The diagram technique for ferromagnetic systems with spin 1/2}, journal = {Informatics and Automation}, pages = {159--169}, publisher = {mathdoc}, volume = {184}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1990_184_a4/} }
V. N. Popov; S. A. Fedotov. The diagram technique for ferromagnetic systems with spin 1/2. Informatics and Automation, Theory of operators with a random potential and some problems in statistical physics, Tome 184 (1990), pp. 159-169. http://geodesic.mathdoc.fr/item/TRSPY_1990_184_a4/