Vincent Cheutet Chiara Eva Catalano Jean-Philippe Pernot Bianca Falcidieno Franca Giannini Jean-Claude Léon 3D sketching for aesthetic design using fully free-form deformation features. 916-930 2005 29 Computers & Graphics 6 http://dx.doi.org/10.1016/j.cag.2005.09.009 db/journals/cg/cg29.html#CheutetCPFGL05