1. L. – A. Mihail, The Quality of Deep Drilling Process by Roughness's Contact Measurement, Proceedings of the 6th WSEAS International Conference on Manufacturing Engineering, Quality and Production Systems (MEQAPS , 13) Romania (2013) 60-65.
2. Sandvik Coromant, Metal Cutting Technology Training Handbook 2011-2, C-2948: 125 MUL.
3. Hartner, Precision Cutting Tools – Technical Manual, Germany, (2012).
4. G. Taguchi, S. Chowdhury, Y. Wu, Tacughi's Quality Engineering Handbook, John Willey & Sons Inc. and ASI LLC Michigan, United States of America, (2004).
5. L. – A., Mihail, Robust Engineering of Deep Drilling Process by Surface State Optimization, 14th CIRP CMMO, Turin, Italy, published by Elsevier B.V., Procedia CIRP 8 ( 2013 ) 581 – 586.