TY JOUR TI Properties of Cyclide Dyupen and Their Application. Part 2 KW descriptive geometry KW circular surface KW Kanaloa surface, a Dupin cyclide KW the problem of Apollonius KW the task Farm. JO Geometry & Graphics AU Sal'kov, N.A. PY 2015 IS 3 PB INFRA-M Academic Publishing LLC.