Marangunić, Lj., and J. Pečarić. “Some Remarks on Hilbert’s Integral Inequality”. Rev. Anal. Numér. Théor. Approx. 34, no. 1 (February 1, 2005): 71–78. Accessed April 11, 2025. https://ictp.acad.ro/jnaat/journal/article/view/2005-vol34-no1-art8.