Khan, M. Sajjad Ali, et al. “ON THE GENERALIZATION OF (∈, ∈ \(\vee\)q)-INTUITIONISTIC FUZZY BI-IDEALS OF SEMIGROUPS”. Italian Journal of Pure and Applied Mathematics, vol. 41, Feb. 2019, pp. 116-42, https://journals.uniurb.it/index.php/ijpam/article/view/7143.