Dunković, Dario, and Blaženka Knežević. “Extended Warranty and Its Impact on Perception in Sales Promotion of Durables”. Business, Management and Economics Engineering 21, no. 2 (September 29, 2023): 204–217. Accessed November 21, 2024. https://journals.vilniustech.lt/index.php/BMEE/article/view/19081.