Burenkov, V. I. and Tararykova, T. V. (2014) “On the spectrum of a nonlinear operator associated with calculation of the norm of a linear vector-functional”, Eurasian Mathematical Journal, 5(2), pp. 132–138. Available at: https://emj.enu.kz/index.php/main/article/view/575 (Accessed: 3 January 2026).