1. 54Gre: P. Greenfield, and P. A. Beck, Trans. Am. Inst. Mining Met. Engrs., 200, p 253–257 (1954).
2. 55Nev: M. V. Nevitt, and P. A. Beck, Trans. Am. Inst. Mining Met. Engrs., 203, p 669–674 (1955).
3. 56Duw: P. Duwez, in Theory of Alloy Phases, p 243–254, Am. Soc. Metals, Cleveland, Ohio (1956).
4. 57Gol: H. J. Goldschmidt, Metallurgica, 56, p 17–26 (1957).
5. 57Hel: A. Hellawell, and W. Hume-Rothery, Phil. Trans. Roy. Soc., A249, p 417–459 (1957).