1. CHANG, S. S. L. [ 1969 ]: Fuzzy dynamic programming and the decision making process, Proceedings of the third Princeton Conference on Information Sciences and Systems, 200–203.
2. CHANG, S. S. L. [ 1971 ] Computer Aid to Decision Making, its organization and algorithms, paper presented at IFIP Conference, Liubliana.
3. BELLMAN, R. E., ZADEH, L. A. [ 1970 ]: Decision-Making in a Fuzzy Environment, Management Science, 17, 8141–8164.
4. DORRIS, A. L., SADOSKY, TH. L. [ 1973 ]: A Fuzzy Set Theoretic Approach to Decision Making, paper presented at the 44th National Meeting of the Operations Research Society of America, San Diego, California, Nov., 12–14.
5. ESOGBUE, A. O., RAMESH, V.[ 1970 ]: Dynamic programming and fuzzy allocation processes, Tech. Memo. no. 202, Dept. of Operations Research, Case Western Reserve Univ.