1. Department of Chemical Technology of Oil and Gas Processing, Institute of Chemistry & Chemical Technology, Lviv Polytechnic National University, Lviv, Ukraine
2. Chemical Department, State Enterprise “Ukrainian State Research Coal Chemical Institute (UKHIN)”, Kharkiv, Ukraine
3. Public Joint Stock Company Avdiivka Coke Plant, Avdiivka, Ukraine
4. Department of Chemistry, Faculty of Sciences, Benue State University, Makurdi, Benue State, Nigeria