Weakly P-Small not P-Small Subsets in Groups. - Taras O. Banakh; Nadia Lyaskovska (Int. J. Algebra Comput., 2008)

Packing Index of Subsets in Polish Groups. - Taras O. Banakh; Nadia Lyaskovska; Dusan Repovs (Notre Dame J. Formal Log., 2009)