Savchenko, L. M., D. V. Vorontsov, and Z. M. Rozhenko. “Creating and Editing Pictures With Graphics Programs”. Theory and practice of design, no. 2 (December 25, 2012): 109–112. Accessed March 11, 2025. https://jrnl.nau.edu.ua/index.php/Design/article/view/6161.