Tulkin Mamatov, Nemat Mustafoev, Dilshod Barakaev, and Rano Sabirova , Trans., “Hardy-Littlewood-Type Theorem for Mixed Fractional Integrals in Hölder Spaces”, IJAM, vol. 1, no. 2, pp. 15–19, Feb. 2024, doi: 10.54105/ijam.B1105.101221.