Christmas Tree Case Study: Computed Tomography as a Tool for Mastering Complex Real World Objects with Applications in Computer Graphics IEEE Visualization 2002 Kanitsar A, Theußl T, Mroz L, Srámek M, Vilanova Bartrolí A, Csébfalvi B, Hladuvka J, Fleischmann D, Knapp M, Wegenkittl R, Felkel P, Guthe S, Purgathofer W, Gröller E 2002: 489-492