T. O. Kamalyan, P. S. Gukasyan, S. M. Vardapetyan, and O. A. Kamalyan, “NEW POSSIBILITIES OF LOW-TEMPERATURE GENERATION OF ACTIVE CENTERS DURING HETEROGENEOUS-HOMOGENEOUS ACTIVATION OF PROPANE ON SILICA GEL SURFACE, MODIFIED WITH ZnO BY THE SOL-GEL AND CHEMICAL TRANSPORT REACTION METHODS”, Proc. YSU B: Chem. Biol. Sci., vol. 55, no. 1 (254), pp. 1–6, Apr. 2021.