78438document35209j.1752-4571.2009.00095.x.pdfapplication/pdfc4957074fccfc222807d5040be2c1f1aMD511335652016-02-29 10:03:42https://pure.iiasa.ac.at/id/eprint/8826/1/j.1752-4571.2009.00095.x.pdf