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Springer International Publishing
Reference3 articles.
1. 1. Felix E. Browder (ed.), Mathematical developments arising from Hilbert problems, Proc. Sympos. Pure Math., vol. 28, Amer. Math. Soc, Providence, R. I., 1976.
2. 2. G. Hamel, Ueber die Geometrien, in denen die Geraden die Kürzesten sind, Dissertation, Göttingen, 1901,90 pp.
3. 3. G. Hamel, same title, Math. Ann. 57 (1903), 231-264.