1 |
K. Iseki and S. Tanaka, An introduction to the theory of BCK-algebras, Math. Japon. 23 (1978), no. 1, 1–26.
|
2 |
Y. B. Jun, J. Neggers, and H. S. Kim, Fuzzy d-ideals of d-algebras, J. Fuzzy Math. 8 (2000), no. 1, 123–130.
|
3 |
N. Kuroki and J. N. Mordeson, Structure of rough sets and rough groups, J. Fuzzy Math. 5 (1997), no. 1, 183–191.
|
4 |
Y. C. Lee and H. S. Kim, On d -subalgebras of d-transitive d -algebras, Math. Slovaca 49 (1999), no. 1, 27–33.
|
5 |
J. Meng and Y. B. Jun, BCK-Algebras, Kyung Moon Sa, Seoul, 1994.
|
6 |
J. Neggers and H. S. Kim, On d-algebras, Math. Slovaca 49 (1999), no. 1, 19–26.
|
7 |
J. Neggers, Y. B. Jun, and H. S. Kim, On d-ideals in d-algebras, Math. Slovaca 49 (1999), no. 3, 243–251.
|
8 |
S. S. Ahn, Rough subalgebras/ideals in d-algebras, Int. Math. J. 3 (2003), no. 8, 819–824.
|
9 |
S. S. Ahn, Y. B. Jun, and H. S. Kim, Fuzzy quick ideals in BCK/BCI-algebras, J. Fuzzy Math. 11 (2003), no. 3, 631–637.
|
10 |
S. S. Ahn and G. H. Han, Intuitionistic fuzzy quick ideals in d-algebras, Honam Math. J. 31 (2009), no. 3, 351–368.
|
11 |
S. S. Ahn, Y. B. Jun, and K. J. Lee, Roughness in subtraction algebras, Commun. Korean Math. Soc. 21 (2006), no. 4, 653–664.
|
12 |
K. Iseki, On BCI-algebras, Math. Sem. Notes Kobe Univ. 8 (1980), no. 1, 125–130.
|