Bioactive coatings on a titanium substrate - Antonova, Olga S.; Ferro, Daniela; Petrzhik, Mikhail I.; Medvecký, Ľubomír; Ďurišin, Juraj; Shvorneva, Ludmila I.; Smirnov, Valery Vyacheslavovich; Barinov, Sergey Mironovich