TY JOUR TI Geometric Locations of Points Equally Distance from Two Given Geometric Figures. Part 4: Geometric Locations of Points Equally Remote from Two Spheres KW geometry KW descriptive geometry KW geometrical places of points KW GMT KW analytical geometry KW line KW sphere KW ellipsoid of revolution KW two-sheet hyperboloid of revolution JO Geometry & Graphics AU Vyshnyepolskiy, V.I. AU Zavarihina, E.V. AU Peh, D.S. PY 2021 IS 9 PB INFRA-M Academic Publishing LLC.