TY JOUR TI Properties of Dupin Cyclide and Their Application. Part 3: The Problem of Apollonius KW pairing KW descriptive geometry KW cyclic surfaces KW canal surface KW Dupin cyclide KW the problem of Apollonius. JO Geometry & Graphics AU Sal'kov, N.A. PY 2015 IS 3 PB INFRA-M Academic Publishing LLC.