MathWorld--A Wolfram Web Resource. Wolfram Research, Inc. (英语). Weisstein, Eric W. (编). Hexahemioctacron. at MathWorld--A Wolfram Web Resource. Wolfram Research
Restricted Divisor Function. at MathWorld--A Wolfram Web Resource. Wolfram Research, Inc. (英语). Pollack, Paul; Pomerance, Carl, Some problems of Erdős on
Wolfram Web Resource. Wolfram Research, Inc. (英语). Weisstein, Eric W. (编). Small Dodecahemicosacron. at MathWorld--A Wolfram Web Resource. Wolfram Research
Stephen. "-sqrt[(5+2 sqrt(5))/15]". from Wolfram Alpha: Computational Knowledge Engine, Wolfram Research (英语). Jean Paul Albert Badoureau. Mémoire sur les Figures