Yurij Leonidovich Ershov (On the occasion of his 60th birthday). Goncharov, S.S.; Lavrov, I.A.; Mazurov, V.D.; Mal'tsev, A.A.; Morozov, A.S.; Nikitin, A.A.; Palyutin, E.A.; Smirnov, D.M. — 2000 Vladikavkazskiĭ Matematicheskiĭ Zhurnal