(1)
Gutik, O. V.; Mykhalenych, M. S. On a Semitopological Semigroup $\boldsymbol{B}_{\omega}^{\mathscr{F}}$ When a Family $\mathscr{F}$ Consists of Inductive Non-Empty Subsets of $\omega$. Mat. Stud. 2023, 59, 20-28.