P-closure ideals in BCI-algebras. - Hosain Moussaei; Habib Harizavi; Rajab Ali Borzooei (Soft Comput., 2018)

Bipolar-valued fuzzy soft hyper BCK ideals in hyper BCK algebras. - G. Muhiuddin; Habib Harizavi; Young Bae Jun (Discret. Math. Algorithms Appl., 2020)