IvashchukO. V., ZadereiP. V., and PelagenkoE. N. “On Sidon-Telyakovskii-Type Conditions for the Integrability of Multiple Trigonometric Series”. Ukrains’kyi Matematychnyi Zhurnal 60, no. 5 (May 25, 2008): 579–585. Accessed November 23, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3177.