1. 2) M. Ersson, A. Tilliander and P. Jonsson: Sohn Int. Symp. Advanced Processing of Metals and Materials, Vol. 2, ed. by F. Kongoli and R. G. Reddy, TMS, Warrendale, PA, (2006), 271.
2. 4) H. W. Meyer, W. F. Porter, G. C. Smith and J. Szekely: J. Met., 20 (1968), No. 7, 35.