Erturk, S. , Eyigel, L. , Celik, C. , Sahinoglu, M. , Ay, S. , Kaya, Y. , Kaya, H. (2019), 'Evaluation of Manual and Automatic Calibration Methods for Digital Tachographs', World Academy of Science, Engineering and Technology, Open Science Index 151, International Journal of Transport and Vehicle Engineering, 13(7), 484 - 487.