TY JOUR TI Classical Methods of Surface Formation: Advantages and Disadvantages KW portions of Coons KW Ferguson KW Bezier surfaces KW smooth connection of portions KW smoothness conditions KW nonparametric surface JO Geometry & Graphics AU Korotkiy, V.A. AU Usmanova, E.A. AU Khmarova, L.I. PY 2026 IS 14 PB INFRA-M Academic Publishing LLC.