TY - JOUR TI - Creating the Mathematical Model for the Surface Roughness Values Occurring During the Turning of the Aisi 1040 Steel AU - AKKUŞ, H. AU - YAKA, H. AU - UĞUR, L. JO - Sigma Journal of Engineering and Natural Sciences PY - 2017 VL - 35 SP - 303 EP - 310 DO - ER -