1 | Viacheslav Chornovil Institute of Sustainable Development, Lviv Polytechnic National University, S. Bandera Str. 12, Lviv 79013, Ukraine |
2 | Institute of Administration and Postgraduate Education, Lviv Polytechnic National University, S. Bandera Str. 12, Lviv 79013, Ukraine |
3 | Institute of Chemistry and Chemical Technology, Lviv Polytechnic National University, S. Bandera Str. 12, Lviv 79013, Ukraine |