%0 Journal Article
%@ 0232-9298
%A Brouwer, F.
%A Nijkamp, P.
%A Voogd, H.
%D 1987
%F iiasa:14147
%I Gordon and Breach Science Publishers, Inc
%J Systems Analysis Modelling Simulation
%N 5
%P 399-408
%T Mixed qualitative calculus and economic modeling
%U https://pure.iiasa.ac.at/id/eprint/14147/
%V 4