Minoru Akita, Takeshi Kano "On the Borel summability of $\sum _{n = 1}^\infty n^{ - \alpha } \mathrm{exp} \left( {in^\beta \theta } \right)$," Proceedings of the Japan Academy, Series A, Mathematical Sciences, Proc. Japan Acad. Ser. A Math. Sci. 59(6), 270-273, (1983)