1. History of class-F and inverse class-F techniques;Grebennikov;IEEE Microwave Mag,2018
2. The efficiency of three-electrode tubes used for the production of continuous waves in radio telegraphy, that is, for the conversion of direct current into alternating current;Latour;Proc IRE,1923
3. The development of tube transmitters by the Telefunken company;Meissner;Proc IRE,1922
4. An Arrangement for Minimising Loss in the Production of Oscillations by Means of Vacuum Tubes (in German);Gesellschaft fur drahtlose Telegraphie,1919
5. Lehrbuch der Drahtlosen Telegraphie;Zenneck,1925