no. S4
Phase Transitions in Ferromagnetic Spin Systems at Low Temperatures
Publications mathématiques et informatique de Rennes, no. S4 (1975), article no. 24, 1 p. 
@article{PSMIR_1975___S4_A24_0,
     author = {Slawny, J.},
     title = {Phase Transitions in Ferromagnetic Spin Systems at Low Temperatures},
     journal = {Publications math\'ematiques et informatique de Rennes},
     eid = {24},
     publisher = {D\'epartement de Math\'ematiques et Informatique, Universit\'e de Rennes},
     number = {S4},
     year = {1975},
     language = {en},
     url = {www.numdam.org/item/PSMIR_1975___S4_A24_0/}
}
Slawny, J. Phase Transitions in Ferromagnetic Spin Systems at Low Temperatures. Publications mathématiques et informatique de Rennes, no. S4 (1975), article  no. 24, 1 p. http://www.numdam.org/item/PSMIR_1975___S4_A24_0/

1) W. Holsztynski , J. Slawny Phases of Ferromagnetic Spin Systems at Low Temperatures, Lett. N.C. 1975.

2) W. Holsztynski , J. Slawny In preparation.

3) J. Slawny Ferromagnetic Spin Systems at Low Temperature To appear in Commun. Math. Phys. | MR 424107