TY JOUR TI Generalization to Three-Dimensional Space Fractals of Pythagoras and Koch. Part I KW fractal KW fractal curve KW monomers KW Pythagoras tree, Koch snowflake KW fractals of growth KW fractals of separation. JO Geometry & Graphics AU Zhikharev, L.A. PY 2015 IS 3 PB INFRA-M Academic Publishing LLC.