00505naa#a2200169#i#450# EN\INFRA-M\bibl\7977 20251219215526.5 2308-4898 20151130b2015####ek#y0engy0150####ca RUS RU Generalization to Three-Dimensional Space Fractals of Pythagoras and Koch. Part I Journal article Moscow INFRA-M Academic Publishing LLC. 2015 13 с. Journal article local Zhikharev L. A. zh-szf.ru