1. Imai, Y. and Iséki, K., On axiom systems of propositional calculi, XIV. Proceedings of the Japan Academy Series A: Mathematical Sciences, 42, 1, 19-22, (1966).
2. Bordbar, H., Ahn, S. S., Zahedi, M. M. and Jun, Y. B., Semiring structures based on meet and plus ideals in lower BCK-semilattices, Journal of Computational Analysis and Applications, 23, 5, 945-954, (2017).
3. Bordbar, H. and Cristea, I., Height of prime hyperideals in Krasner hyperrings, Filomat, 31, 19, 6153–6163, (2017).
4. Bordbar, H., Cristea, I. and Novak, M., Height of hyperideals in Noetherian K rasner hyperrings, University Politehnica of Bucharest Scientific Bulletin, Series A: Applied Mathematics and Physics, 79, 2, 31-42, (2017).
5. Bordbar, H., Zahedi, M. M. and Jun, Y. B., Semi-prime and meet weak closure operations in lower BCK-semilattices, Quasigroups and Related Systems, 25, 41-50, (2017).