%0 Journal Article %A F. J. Dyson %T An Ising ferromagnet with discontinuous long-range order %J Matematika %D 1972 %P 117-129 %V 16 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAT_1972_16_3_a5/ %G ru %F MAT_1972_16_3_a5