1. Frequency domain vibration monitoring module integrated in real-time machine tool monitoring systems;Bartal,1986
2. Walsh Functions and Their Applications;Beauchamp,1975
3. The Fast Fourier Transform;Brigham,1974
4. On-line frequency domain detection of production machinery malfunctions;Dornfeld,1977
5. Real-time monitoring of machine tools via the Walsh-Hadamard transform;Hermann,1982