TY JOUR TI On Application of Transformations at Descriptive Geometry’s Problems Solution KW descriptive geometry KW geometric transformations KW parametric calculus KW stratified transformations KW inversion KW invariant curve KW surfaces with variable cross-section shape. JO Geometry & Graphics AU Borovikov, I.F. AU Ivanov, G.S. AU Surkova, N.G. PY 2018 IS 6 PB INFRA-M Academic Publishing LLC.