[1] H.A.S. Abujabal, M. Aslam and A.B. Thaheem: A Characterization of minimal prime ideals of BCK-algebras. Math. Japonica 37 (1992), 973–978. MR 1186571

[2] J. Ahsan and A.B. Thaheem: On ideals in BCK-algebras. Math. Sem. Notes 5 (1977), 167–171. MR 0457202

[3] J. Ahsan, E.Y. Deeba and A.B. Thaheem: On prime ideals of BCK-algebras. Math. Japonica 36 (1991), 875–882. MR 1128438

[4] M. Aslam and A.B. Thaheem: On certain ideals of BCK-algebras. Math. Japonica 36 (1991), 895–906. MR 1128441

[5] M. Aslam and A.B. Thaheem: On ideals of BCK-algebras. Math. Japonica (to appear). MR 1319409

[6] M. Aslam and A.B. Thaheem: New proof of prime ideal theorem for BCK-algebras. Math. Japonica 38 (1993), 969–972.

[7] W.H. Cornish: On Iseki’s BCK-algebras. Algebraic Structures and Applications, Proc. of the First Western Australian Conference on Algebra, Marcel Dekker, Inc, New York, 1982, pp. 101–122. MR 0647169 | Zbl 0486.03033

[8] W.H. Cornish: Varieties generated by finite BCK-algebras. Bull. Aust. Math. Soc. 22 (1980), 411–430. DOI 10.1017/S0004972700006730 | MR 0601648 | Zbl 0439.08007

[9] C.S. Hoo: Bounded commutative BCK-algebras satisfying D.C.C. Math. Japonica 32 (1987), 217–225. MR 0895542 | Zbl 0638.03066

[10] C.S. Hoo and P.V. Ramana Murty: The ideals of bounded commutative BCK-algebras. Math. Japonica 32 (1987), 723–733. MR 0918284

[11] K. Iseki: On some ideals in BCK-algebra. Math. Sem. Notes 3 (1975), 65–70. MR 0419223

[12] K. Iseki and S. Tanaka: Ideal theory of BCK-algebras. Math. Japonica 21 (1976), 351–366. MR 0441816

[13] K. Iseki and S. Tanaka: An introduction to the theory of BCK-algebras. Math. Japonica 23 (1978), 1–26. MR 0500283

[14] K. Iseki: On finite BCK-algebras. Math. Japonica 25 (1980), 225–229. MR 0580229 | Zbl 0432.03039