Kovač, Pavel, and Jelena Stankov. “Determination of the Roughness After Polishing Using Fractional Design in the Responce Surface Methodology”. Journal of Production Engineering 1, no. 1 (September 15, 1984): 217–228. Accessed June 15, 2025. https://sp.ftn.uns.ac.rs/index.php/jpe/article/view/402.