Commutative pseudo valuations on BCK-algebras. Doh, Myung Im; Kang, Min Su — 2011 International Journal of Mathematics and Mathematical Sciences
𝒩 -subalgebras in BCK/BCI-algebras based on point 𝒩 -structures. Jun, Young Bae; Kang, Min Su; Park, Chul Hwan — 2010 International Journal of Mathematics and Mathematical Sciences
Implicative ideals of BCK-algebras based on the fuzzy sets and the theory of falling shadows. Jun, Young Bae; Kang, Min Su; Park, Chul Hwan — 2010 International Journal of Mathematics and Mathematical Sciences