Variational characterisation of Gibbs measures with Delaunay triangle interaction. Dereudre, David, Georgii, Hans-Otto (2009) Electronic Journal of Probability [electronic only]
Variational characterization of interior interfaces in phase transition models on convex plane domains. Garza-Hume, Clara E., Padilla, Pablo (2003) Electronic Journal of Differential Equations (EJDE) [electronic only]
Variational principle, conjugate convex functions and “the equivalence of ensembles” Marc Pirlot (1985) Annales scientifiques de l'Université de Clermont-Ferrand 2. Série Probabilités et applications
Variational principle for quasi-local algebras over the lattice Akitaka Kishimoto (1979) Annales de l'I.H.P. Physique théorique