1. R. Irman: Sintered Aluminum with High Strength at Elevated Temperatures. Metallurgica, 1952, vol. 46, No. 275, pp. 125–133.
2. E. Gregory and N. J. Grant: High Temperature Strength of Wrought Aluminum Powder Products. AIME Trans, 1954, vol. 200, pp. 247-252; Journal of Metals, February 1954.
3. N. J. Grant and O. Preston: Dispersed Hard Particle Strengthening of Metals. AIME Trans, 1957, vol. 209, pp. 349-360; Journal of Metals, March 1957.