1. Fuzzy PERT;Buckley,1989
2. Discrete fuzzy optimization;Chanas,1998
3. A model of activity performance time in the light of fuzzy sets theory;Chanas;Problem Organizacji,1976
4. Critical path analysis in the network with fuzzy activity times;Chanas,2000
5. Handling preference and uncertainty in fuzzy scheduling;Dubois,2000