1. On some experiments in which two neighboring maintained oscillatory circuits affect a resonating circuit;VINCENT;Proc. Phys. Soc.,1919
2. Über Störungsfreien Gleichstromempfang mit den Schwinganion;MOLLER;Jahrb. Draht. Teleg.,1921
3. The automatic synchronization of triode oscillators;APPLETON;Proc. Cambridge Phil. Soc.,1922
4. Forced oscillations in a circuit with non-linear resistance;VAN DER POL;Phil. Mag.,1927
5. The locked-in oscillator;BYARD;Wireless Eng.,1941