1. L-Fuzzy Sets;Goguen;Naval Research Report under contracts,1966
2. L-Fuzzy Sets;Goguen;Naval Research Report under contracts,1966
3. Algebra;MacLane,1967
4. Applications of the theory of Boolean rings to general topology;Stone;Trans. Amer. Math. Soc.,1937
5. Fuzzy sets;Zadeh;Information and Control,1965