Slavov, Stoyan Dimitrov, и Iliyan Velichkov Iliev. „Research on the Variability of the Burnishing Force During Processing Surfaces With 3D Shape by Using Simultaneous 5-Axis Ball-Burnishing Process Implemented on CNC Milling Machine“. ГОДИШНИК НА ТЕХНИЧЕСКИ УНИВЕРСИТЕТ - ВАРНА 1, no. 1 (Декември 28, 2017): 6–12. отворен на Ноември 17, 2025. https://aj.tu-varna.bg/index.php/ajtuv/article/view/20.