참고문헌
- Springer Ser. Discrete Math. Theor. Comput. Sci Pseudo-BCK algebras: an extension of BCK algebras, Combinatoriecs, computability and logic ( Constanta 2001) G. Georgescu;A. Lorgulescu
- Proc. Japan Acad v.42 On axion systems of propositional calculi Y. Imai;K. Iseki
- Math. Seminar Notes v.3 on ideals in BCK-algebras K. Iseki
- Math. Japonica v.23 no.1 An introduction to the theory of BCK-algebras K. Iseki;S. Tanaka
- Scientiae Mathematicae Japonicae Online v.7 Characterizations of pseudo-BCK algebras Y. B. Jun;K. H. Kim
- J. Appl. Math. & Computing v.10 no.1-2 Fuzzy convex sets in median algebras Y. B. Jun;K. H. Kim
- Scientiae Mathematicae Japonicae v.8 Pseudo-ideals of pseudo-BCK algebras Y. B. jun;M. Kondo;K. H. Kim
- BCK-algebras J. Meng;Y. B. Jun
- Information and Control v.8 Fuzzy sets L. A. Zadeh