TY JOUR TI TESTS OF FIRE EXTINGUISHING ABILITY OF ALUMINUM HYDROGEL WHEN EXTINGUISHING MODEL NATURAL GROUND FIRES KW forest fires KW ground fires KW fire extinguishing KW aluminum hydrogel JO Forestry Engineering Journal AU Ivchenko, O.A. AU Pankin, K.E. PY 2020 IS 10 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov