@article{Aschwanden:1306,
      author        = "Aschwanden, M. J. and Boerner, P. and Caspi, A. and
                       McTiernan, J. M. and Ryan, D. F. and Warren, H. P.",
      title         = "{Benchmark Test of Differential Emission Measure Codes and
                       Multi-thermal Energies in Solar Active Regions}",
      year          = "2015",
}