Quark Hadron Duality at Finite Temperature
  At low temperatures we expect that all QCD observables are defined in terms of hadrons. This includes the partition function as well as the Polyakov loop in all representations. We analyze the physics underlying a microscopic derivation of the hadron resonance gas. 
E. Ruiz Arriola, L.L. Salcedo, E. Megias
hep-ph hep-lat nucl-th