1. G.K. Lewis, J.O. Milewski, R.B. Nemec, D.J. Thoma, M. Barbe, D. Cremers, LA-UR-95-2845, 1995.
2. J. Brooks, C. Robino, T. Headley, S. Goods, M. Griffith, Solid Freeform Fabrication Proc., University of Texas, Austin, 1999, pp. 375.
3. T. Takeda, W.M. Steen, D.R.F. West, Proceedings of ICALEO'84, 44, 1984, pp. 151.
4. W.M. Steen, R.M. Vilar, K.G. Watkins, M.G.S. Ferreira, P. Carvalho, C.L. Sexton, M. Pontinha, M. McMohan, Proceedings of ICALEO'92, 52, 1992, pp. 278.