1. G.R.B. Elliott, “Continuous Production of Titanium and Other Metals and Growth of Crystalline Needles,” U.S. patent application 60/055690 (1997).
2. ASME Research Report CRTD;ASME,1997
3. ASME Research Report CRTD;S.J. Gerdemann,1997
4. J.C. White and L.L. Oden, “Continuous Production of Granular or Powder Ti, Zr, Hf, or Their Alloys,” U.S. patent 5,259,862 (1993).
5. ASME Research Report CRTD;H.Y. Sohn,1997