Klaričić Bakula, Milica, and Josip Pečarić. “New Upper Bounds for the Weighted Chebyshev Functional”. Annales Mathematicae Silesianae, vol. 38, no. 1, Jan. 2024, pp. 37-56, https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/16731.