B. Kenzhaliyev, S. Trebukhov, V. Volodin, Trebukhov А., and F. Tuleutay, “Selenium extraction out of metallurgical production middlings”, Kompl. Ispolz. Min. Syra = Compl. Use of Min. Resour., vol. 307, no. 4, pp. 56–64, Oct. 2018.