Goertzel, G. (jaanuar 1958). "An Algorithm for the Evaluation of Finite Trigonometric Series". American Mathematical Monthly. 65 (1): 34–35. DOI:10.2307/2310304. JSTOR2310304.
Goertzel, G. (jaanuar 1958). "An Algorithm for the Evaluation of Finite Trigonometric Series". American Mathematical Monthly. 65 (1): 34–35. DOI:10.2307/2310304. JSTOR2310304.