Nataliia, B. ., T. . Olena, and Y. . Denys. “Analysis of the Correspondence Between DCT and Non-Classical Walsh-Hadamard Transforms for Code-Controlled Steganography”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 18, no. 1, Mar. 2026, pp. 9-17, doi:10.54554/jtec.2026.18.01.002.