Lingenberg, R. (1979). Metric planes and metric vector spaces. John Wiley.
Chicago-čujuhus (17. p.)Lingenberg, Rolf. Metric Planes and Metric Vector Spaces. Nueva York: John Wiley, 1979.
MLA-čujuhus (9. p.)Lingenberg, Rolf. Metric Planes and Metric Vector Spaces. John Wiley, 1979.
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