1. H. P. Stüwe:Recrystallization of Metallic Materials, F. Haeßner, ed., Riederer Verlag, Stuttgart, 1978, pp. 11–21.
2. C. J. Smithells:Tungsten, 3rd ed., Chapman and Hall, London, 1952, p. 211.
3. Z. Jeffries:Trans. AIME, 1918, vol. 59, p. 1037.
4. C. J. Smithells:J. Inst. Metals, 1922, vol. 27, p. 107.
5. A. Pacz: USA Patent 1,410,499, 1922.