1. N.F. Alekseev, D.D. Malairov, Generation of high-power oscillations with a magnetron in the centimeter band. J. Tech. Phys. (USSR) 10, 1297–1300 (1940)
2. J.T. Randell, H.A. Boot, High-frequency electrical oscillator. US 2,542,966 (issued Feb 20, 1951)
3. W.W. Hansen, R.D. Richtmeyer, On resonators suitable for klystron oscillators. J. Appl. Phys. 10, 189–199 (1939)
4. W.W. Hansen, A type of electrical resonator. J. Appl. Phys. 9(10), 654–663 (1938)
5. R.J. Collier, J. Feinstein, Magnetrons. US 2,854,603 (issued Sept 30, 1958)