Kozhemiakina, Nadejda, Vladimir Lukin, Nikolay Ponomarenko, and Victoria Naumenko. 2021. “Recursive Group Coding for Image DCT Compression Efficiency”. Technium: Romanian Journal of Applied Sciences and Technology 3 (1). Constanta, Romania:150-55. https://www.techniumscience.com/index.php/technium/article/view/2507.