Slepenchuk, K.M. (1966) “Extension of Holder’s means and Tauber type theorem for these methods ”, Ukrains’kyi Matematychnyi Zhurnal, 18(1), pp. 129–134. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/8664 (Accessed: 17 February 2026).