References cited in this section

6. R. Bunting, Proc. of the 5th Int. Tungsten Symp. (Budapest), MPR Publishing Services Ltd., in cooperation with the International Tungsten Industry Association, 1990, p 87-94

7. O. Hedebrant, Proc. of the 5th Int. Tungsten Symp. (Budapest), MPR Publishing Services Ltd., in cooperation with the International Tungsten Industry Association, 1990, p 95-98

8. K. Miyake, Proc. of the 5th Int. Tungsten Symp. (Budapest), MPR Publishing Services Ltd., in cooperation with the International Tungsten Industry Association, 1990, p 99-109

9. Technical data, International Tungsten Industry Association

10. ITIA, International Tungsten Industry Association, 1997

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