НооshmаndМ. Н. “Functions of Ultraexponential and Infralogarithm Types and General Solution of the Abel Functional Equation”. Ukrains’kyi Matematychnyi Zhurnal 63, no. 2 (February 25, 2011): 281-288. Accessed March 4, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2716.