TY CONF TI MATHEMATICAL EXPERIMENTAL PLANNING AND DETERMINATION OF RATIONAL VALUES OF SKIN FAT PARAMETERS FOR TOP SHOES BASED ON ESTER KW fatliquoring process KW full-factor experiment KW temperature KW duration KW pH-environment KW Cochran's criterion JO CAD/EDA/SIMULATION IN MODERN ELECTRONICS 2021 AU Mahammadieva, H.N. AU Shamsieva, M.B. PY 2021 PB Bryansk State Technical University