赫尔维茨ζ函数 (原始内容存档于2010-03-16). Vepstas, Linas. The Bernoulli Operator, the Gauss–Kuzmin–Wirsing Operator, and the Riemann Zeta (PDF). [2015-02-04]. (原始内容存档
函数 Old Intelligencer: Some definitions of the concept of function from Bernoulli, Joh. to Bourbaki, N.. Mathematical Intelligencer. 1984, 6 (4): 71–78