1. Wassermann, G. & Weerts, J. On the mechanism of CuAl2-precipitation in an age-hardenable aluminium alloy. Metallwirtsch. 14, 605 (1935).
2. Guinier, A. Structure of age-hardened aluminium-copper alloys. Nature 142, 569 (1938).
3. Preston, G. D. Structure of age-hardened aluminium-copper alloys. Nature 142, 570 (1938).
4. Polmear, I. J. & Hardy, H. K. Some metallographic observations on aged aluminium–copper alloys. J. Inst. Met. 81, 427–432 (1952-53).
5. Silcock, J. M., Heal, T. J. & Hardy, H. K. Some metallographic observations on aged aluminium–copper alloys. J. Inst. Met. 82, 239–248 (1953-54).