@techreport{iiasa4571,
           month = {March},
            type = {IIASA Working Paper},
           title = {Emission Trading for Air Pollution Control in Practice},
         address = {IIASA, Laxenburg, Austria},
       publisher = {WP-95-021},
            year = {1995},
             url = {https://pure.iiasa.ac.at/id/eprint/4571/},
          author = {Klaassen, G. and Nentjes, A.}
}