TY JOUR TI On the Peculiarities of the Constructive Solution For Dandelin Spheres Problem KW geometric modeling KW projective geometry KW imaginary geometry KW Dandelin spheres KW quadric KW second-order curve KW involution KW conic KW focus KW Simplex. JO Geometry & Graphics AU Voloshinov, D.V. PY 2018 IS 6 PB INFRA-M Academic Publishing LLC.