Middle East Technical University, Ankara, 06800, Turkey; Sobolev Institute of Mathematics, Novosibirsk, 630090, Russian Federation; Department of Applied Mathematics, College of Sciences, Palestine Technical University-Kadoorie, Tulkarem, Palestine
Emelyanov E.Y., Middle East Technical University, Ankara, 06800, Turkey, Sobolev Institute of Mathematics, Novosibirsk, 630090, Russian Federation; Marabeh M.A.A., Department of Applied Mathematics, College of Sciences, Palestine Technical University-Kadoorie, Tulkarem, Palestine
M.A.A. Marabeh; Department of Applied Mathematics, College of Sciences, Palestine Technical University-Kadoorie, Tulkarem, Palestine; email: mohammad.marabeh@ptuk.edu.ps