1. Production and characterization of hydrogen-reduced submicron tungsten powders. Part 1: State of the art in research, production and characterization of raw materials and tungsten powders;Schubert;Int. J. of Refractory Metals & Hard Materials,1991
2. Formation of tungsten blue oxide and its hydrogen reduction;Zou,1985
3. Kinetics of the hydrogen reduction of tungsten oxides;Schubert;Int. J. Refrac. & Hard Metals,1990
4. Quality control and testing methods for hard metals;Lardner,1979