1. Institute of Materials Engineering, Kazimierz Wielki University in Bydgoszcz, Bydgoszcz, Poland
2. Department of General Technical Subjects, Stepan Gzytsky Natoinal University of Veterinary Medicine and Biotechnologies Lviv, Lviv, Ukraine
3. Department of Physical and Colloid Chemistry, Ivan Franko National University of Lviv, Lviv, Ukraine