Dovgoshei, A.A. and Potemkina, L.L. (2003) “Analyticity of Higher-Order Moduli of Continuity of Real-Analytic Functions”,
Ukrains’kyi Matematychnyi Zhurnal, 55(6), pp. 750–761. Available at:
https://umj.imath.kiev.ua/index.php/umj/article/view/3950 (Accessed: 7 April 2025).