Derrida, B.Lebowitz, J. L.Speer, E. R.2004-12-032004-12-0320012001http://hdl.handle.net/2003/124910.17877/DE290R-11062enThe American Physical SocietyPhysical Review Letters530Free Energy Functional for Nonequilibrium Systems: An Exactly Solvable Case10.1103/PhysRevLett.87.150601article (journal)