1. Computer relaying IEEE Tutorial Course, 79 EHO 148-7-PWR
2. The development and selection of algorithms for relaying of transmission lines by digital computer;Gilbert,1978
3. A note on impedance measurement using digital computers;Ramamoorthy,1971
4. The use of Walsh functions for high speed digital relaying;Horton,1975
5. A proposed method for harmonic-restraint differential protection for power transformers;Sykes;IEEE Trans. Power Appar. & Syst.,1972