@incollection{iiasa4700,
       booktitle = {The Future Population of the World: What Can We Assume Today?},
          editor = {W. Lutz},
           title = {Probabilistic population projections based on expert opinion},
         address = {London},
       publisher = {Earthscan},
            year = {1996},
             url = {https://pure.iiasa.ac.at/id/eprint/4700/},
            isbn = {1853833495},
          author = {Lutz, W. and Sanderson, W. C. and Scherbov, S.}
}