To sum up
 Venuvinod PK, Ma W. Rapid prototyping – laser-based and other technologies. Kluwer Academic Publishers 2003. ISBN: 1-4020-7577-4.
 Pauwels J, Swaelens B, Vancraen W. Method for supporting an object made by means of stereolithography or another rapid prototype production method. Patent US5595703 A; 1997.
 Venuvinod PK, Ma W. Rapid prototyping: laser-based and other technologies. US: Springer; 2004.
 F. Calignano, “Design optimization of supports for overhanging structures in aluminum and titanium alloys by selective laser melting,” Mater. Des., vol. 64, pp. 203–213, Dec. 2014.