Authors
Ya. Zhydachevskyy
Lviv Polytechnic National University, Lviv, Ukraine
Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
O. Kravets
Ivan Franko National University of Lviv, Lviv, Ukraine
N. Martynyuk
Lviv Polytechnic National University, Lviv, Ukraine
S. Ubizskii
Lviv Polytechnic National University, Lviv, Ukraine
A. Suchocki
Institute of Physics, Polish Academy of Sciences, Warsaw, Poland
Institute of Physics, University of Bydgoszcz, Bydgoszcz, Poland