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. (2021). Proceedings of the YSU B: Chemical and Biological Sciences, 55(1 (254), 1-6. https://doi.org/10.46991/PYSU:B/2021.55.1.001