Pyshyev, Serhiy     Desulphurization and usage of medium-metamorphized black coal. 1. Determination of the optimal conditions for oxidative desulphurization [Текст] / Serhiy Pyshyev, Yuri Prysiazhnyi, Denis Miroshnichenko, Halyna Bilushchak and Roksolana Pyshyeva // Chemistry & Chemical Technology / Lviv Polytechnic Nat. Univ. ; ed.-in-chief M. Bratychak. — Lviv : Publ. House of Lviv Polytechnic Nat. Univ., 2014. — P. 225-234.