Helmberg, G. (2007). Getting acquainted with fractals. Walter de Gruyter.
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Chicago-čujuhus (17. p.)
Helmberg, Gilbert. Getting Acquainted with Fractals. Berlin ; New York: Walter de Gruyter, 2007.
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MLA-čujuhus (9. p.)
Helmberg, Gilbert. Getting Acquainted with Fractals. Walter de Gruyter, 2007.
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