SYMMETRIES AND FIRST INTEGRALS OF A SECOND ORDER EVOLUTIONARY OPERATOR EQUATION СтатьяBudochkina S.A.Eurasian Mathematical Journal. Том 3. 2012. С. 18-28
RATIONAL HOMOTOPY TYPE, RATIONAL PROPER HOMOTOPY TYPE AND RATIONAL PROPER HOMOTOPY TYPE AT INFINITY СтатьяLisica Ju.T.Topology Proceedings. Том 37. 2011. С. 409-458