Yanchenko, S. Y. (2010). Approximation of the classes $S^r_{p,θ}B(\mathbb{R}^d)$ of functions of many variables by entire functions of a special form. Ukrains’kyi Matematychnyi Zhurnal, 62(8), 1124–1138. https://umj.imath.kiev.ua/index.php/umj/article/view/2942