Translated by W. C. Wake from a paper given in German at the VIth Conference, Intermetal Bond, organized by the Czechoslovak Scientific and Technical Society, SVTS, Bratislava. The paper appeared earlier in Periodica Polytechnica (Mechanical Engng.) vol. 18, nos. 2/3, 103–112 (1974) in substantially the same form.
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Frigyes Thamm (1976) studied this question.
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