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@article{AIHPA_1967__6_4_299_0, author = {Robinson, Derek W. and Ruelle, David}, title = {Extremal invariant states}, journal = {Annales de l'I.H.P. Physique th\'eorique}, pages = {299--310}, publisher = {Gauthier-Villars}, volume = {6}, number = {4}, year = {1967}, mrnumber = {217609}, language = {en}, url = {http://geodesic.mathdoc.fr/item/AIHPA_1967__6_4_299_0/} }
Robinson, Derek W.; Ruelle, David. Extremal invariant states. Annales de l'I.H.P. Physique théorique, Tome 6 (1967) no. 4, pp. 299-310. http://geodesic.mathdoc.fr/item/AIHPA_1967__6_4_299_0/