211989document72937paper%20calliari%20LD%20IIASA.pdfapplication/pdf2d7ff8825b4ad11753f66b8220e3219aMD52110932017-03-23 09:46:46https://pure.iiasa.ac.at/id/eprint/13909/1/paper%2520calliari%2520LD%2520IIASA.pdf