참고문헌
- Amer. Math. Sco. Coll. Publ. v.XXV Lattice Theory G. Birkhoff
- J. London Math. Soc. v.40 Pseudo-residuals in semigroups T.S. Blyth
- Semigroup Forum v.46 Homomorphisms of implicative semigroups M.W. Chan;K.P. Shum
- Foundations of mathematics Logic H.B. Curry
- Semigroup Forum v.54 On ordered filters of implicative semigroups Y.B. Jun;J. Meng;X.L. Xin
- Trans. Amer. Math. Soc. v.117 Implicative sedilattices W.C. Nemitz