Cherskii, Yu. I. “On the Analyticity of the Fourier Original and Fourier Transform Inside Alternate Angles”.
Ukrains’kyi Matematychnyi Zhurnal
, vol. 51, no. 5, May 1999, pp. 703–707,
https://umj.imath.kiev.ua/index.php/umj/article/view/4655
.