6Lin F H,Yang X P. Geometric Measure Theory[M]. Beijing/New York:Science Press,2002.
7Besicovitch A S,Ursell H D. Sets of fractional dimensions(V):On dimensional numbers of some continues curves[J]. J London Math Soc, 1937,12(1) : 18--25.
8Berry M V, Lewis Z V. On the Weierstrss-Mandelbrot fraetal function[J]. Proc R Soc London, 1980,370(A) :459--484.