General Topology. Topological Algebra.

1. O. Gutik, D. Pagon, and D. Repovš, “The continuity of the inversion and the structure of maximal subgroups in countably compact topological semigroups”, Acta Mathematica Hungarica, 124:3 (2009), 201–214      
2. T. O. Banakh, S. Dimitrova, and O. V. Gutik, “The Rees-Suschkewitsch Theorem for simple topological semigroups”, Mat. Stud., 31:2 (2009), 211–218  
3. O. Gutik, J. Lawson, and D. Repov., “Semigroup closures of finite rank symmetric inverse semigroups”, Semigroup Forum, 78:2 (2009), 326–336      
4. O. V. Gutik, and D. Repovš, “On linearly ordered H-closed topological semilattices”, Semigroup Forum, 77:3 (2008), 474–481      
5. O. V. Gutik, and D. Repovš, “On countably compact 0-simple topological inverse semigroups”, Semigroup Forum, 75:2 (2007), 464–469      

• Ya. S. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics, NAS Ukraine, L'vov
• Ivan Franko National University of L'viv