Effect of doping with copper (II) and nickel (II) oxides on morphological properties of silica/titania nanocomposites - M. A. Nazarkovsky; E. V. Goncharuk; E. M. Pakhlov; E. Skwarek; J. Skubiszewska-Zieba; R. Leboda; W. Janusz; V. M. Gunko (Chemistry, physics and technology of surface, 2012)