Simonyan, L.S. “THE REPRESENTATION OF FUNCTIONS BY WALSH DOUBLE SYSTEM IN WEIGHTED $ L_{\mu}^{p} [0,1)^2 $-SPACES”. Proceedings of the YSU A: Physical and Mathematical Sciences, vol. 53, no. 3 (250), Dec. 2019, pp. 156-62, doi:10.46991/PYSU:A/2019.53.3.156.