Some properties of Van Koch's curves.
Variation preserving extensions and generalized essential variation.
On the logarithmic potential defined for a Van Koch curve.
On the Sobolev class and quasiregularity.
On essential -variation.
Lipschitz mappings, contingents, and differentiability.
Stability in the Cauchy and Morera theorems for holomorphic functions and their spatial analogs.
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