Bolshakov, V. I., Y. L. Savin, O. P. Prykhodko, L. S. Savin, and V. M. Kulbashnyi. “PHYSIC AND CHEMICAL BASIS FOR THE INVOLVEMENT OF D-ELEMENTS OF THE FOURTH GROUP (TITANIUM, ZIRCONIUM, HAFNIUM) IN THE SYNTHESIS OF BUILDING AND SILICATE MATERIALS”. Science and Transport Progress, no. 20, Feb. 2008, pp. 99-101, doi:10.15802/stp2008/16725.