L. Simonyan, “THE REPRESENTATION OF FUNCTIONS BY WALSH DOUBLE SYSTEM IN WEIGHTED $ L_{\mu}^{p} [0,1)^2 $-SPACES”, Proc. YSU A: Phys. Math. Sci., vol. 53, no. 3 (250), pp. 156–162, Dec. 2019, doi: 10.46991/PYSU:A/2019.53.3.156.