Variational principle, conjugate convex functions and “the equivalence of ensembles”
Annales scientifiques de l'Université de Clermont-Ferrand 2. Série Probabilités et applications, Tome 87 (1985) no. 4, pp. 57-68. 
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     title = {Variational principle, conjugate convex functions and {\textquotedblleft}the equivalence of ensembles{\textquotedblright}},
     journal = {Annales scientifiques de l'Universit\'e de Clermont-Ferrand 2. S\'erie Probabilit\'es et applications},
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     volume = {87},
     number = {4},
     year = {1985},
     zbl = {0582.49033},
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     url = {http://archive.numdam.org/item/ASCFPA_1985__87_4_57_0/}
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Pirlot, Marc. Variational principle, conjugate convex functions and “the equivalence of ensembles”. Annales scientifiques de l'Université de Clermont-Ferrand 2. Série Probabilités et applications, Tome 87 (1985) no. 4, pp. 57-68. http://archive.numdam.org/item/ASCFPA_1985__87_4_57_0/

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