1. A. Wilm, German Patent DRP 244554 (1909).
2. Precipitation in metals;Brook,1963
3. The ageing characteristics of some ternary aluminium–copper–magnesium alloys with copper:magnesium ratios of 7:1 and 2.2:1;Hardy;J. Inst. Met.,1954
4. The effects of small additions of silver on the aging of some aluminium alloys;Polmear;Trans. Met. Soc. AIME,1964
5. The influence of small additions of silver on the ageing of aluminium alloys: observations on Al–Cu–Mg alloys;Vietz;J. Inst. Met.,1966