1. Fuzzy sets;Zadeh;Inf. Control,1965
2. A fuzzy-algorithmic approach to the definition of complex and imprecise concepts;Zadeh;Int. J. Man-Machine Stud.,1976
3. Underground mine hazard analysis technique;Ellison,1978
4. Hazard prediction model development: the multiple overlay technique;Ellenberger,1981
5. Geotechnical and stability requirements for future coal mines;Seegmiller,1983