1. Statistical Methods for Forecasting;Abraham,1984
2. Fuzzy Sets and Systems. Theory and Applications;Dubois,1980
3. Fuzzy linear regression and its applications to forecasting in uncertain environment;Heshmaty;Fuzzy Sets and Systems,1985
4. Fuzzy Mathematical Techniques with Applications;Kandel,1986
5. Fuzzy processes;Kandel;Fuzzy Sets and Systems,1980