The publication "National REDD + reference levels deduced from the global deforestation curve" by Margret Köthke, Bettina Schröppel and Peter Elsasser has been published in Forest Policy and Economics Volume 43.
Köthke M, Schröppel B, Elsasser P (2014) National REDD + reference levels deduced from the global deforestation curve. Forest Pol Econ 43:18-28. doi: 10.1016/j.forpol.2014.03.002