Adamov, A.N. (2009) “Inequality of the Turan type for trigonometric polynomials and conjugate trigonometric polynomials in $L_0$”,
Ukrains’kyi Matematychnyi Zhurnal, 61(7), pp. 986–995. Available at:
https://umj.imath.kiev.ua/index.php/umj/article/view/3073 (Accessed: 14 April 2025).