TY - JOUR ID - iiasa14147 UR - http://hdl.handle.net/11370/340c68dc-6e82-4ccf-86cc-f35c0db7cd85 IS - 5 A1 - Brouwer, F. A1 - Nijkamp, P. A1 - Voogd, H. Y1 - 1987/// PB - Gordon and Breach Science Publishers, Inc JF - Systems Analysis Modelling Simulation VL - 4 SN - 0232-9298 TI - Mixed qualitative calculus and economic modeling SP - 399 AV - none EP - 408 ER -