O. Špakov and D. Miniotas, “Visualization of Eye Gaze Data using Heat Maps”, ELEKTRON ELEKTROTECH, vol. 74, no. 2, pp. 55–58, Feb. 2007, Accessed: Feb. 08, 2026. [Online]. Available: https://eejournal.ktu.lt/index.php/elt/article/view/10372