1. I. V. Nikolaenko, G. I. Batalin, and E. A. Beloborodova, ?Calorimetric investigation of the enthalpies of formation of liquid alloys of germanium with rare-earth elements,? Dokl. Akad. Nauk UkrSSR, Ser. B, No. 12, 51?55 (1980).
2. G. V. Samsonov and V. N. Bondarev, Germanides [in Russian], Metallurgiya, Moscow (1968).
3. C. J. Smithells, Metals [Russian translation], Metallurgiya, Moscow (1980).
4. C. E. Wicks and F. E. Block, Thermodynamic Properties of 65 Elements: Their Oxides, Halides, Carbides, and Nitrides [Russian translation], Metallurgiya, Moscow (1965).
5. I. V. Nikolaenko, E. A. Beloborodova, and G. I. Batalin, ?Enthalpies of mixing for liquid alloys of germanium with yttrium,? Zh. Fiz. Khim.,53, No. 7, 1873?1874 (1979).