@article{TMF_1986_67_1_a2,
     author = {V. A. Arzumanian and B. S. Nakhapetian and S. K. Pogosyan},
     title = {Cluster properties of classical lattice spin systems with vacuum},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {21--31},
     year = {1986},
     volume = {67},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1986_67_1_a2/}
}