Kostecka, Jolanta, and Vida Davidavičienė. “Model of Employees Motivation through Gamification of Information System”. Mokslas – Lietuvos ateitis / Science – Future of Lithuania 7, no. 2 (May 28, 2015): 262-274. Accessed September 28, 2021. https://journals.vgtu.lt/index.php/MLA/article/view/2673.