Fabrication and Crystal Structure of Nanodisperse TiO2 Doped with Niobium and Zirconium - I. M. Budzuliak; B. K. Ostafiichuk; R. V. Ilnytskyi; L. M. Humeniuk; V. M. Pylypiv; R. A. Zatorskyi (Metallophysics and advanced technologies, 2013)