W. Cramp, Nora I. Calderwood: The use of single-core sheathed cables for alternating currents. In: Journal of the Institution of Electrical Engineers. Band61, Nr.317, 1. April 1923, ISSN2054-0612, S.477–485, doi:10.1049/jiee-1.1923.0067 (theiet.org [abgerufen am 19. August 2021]).
W. Cramp, Nora I. Calderwood: The use of single-core sheathed cables for alternating currents. In: Journal of the Institution of Electrical Engineers. Band61, Nr.317, 1. April 1923, ISSN2054-0612, S.477–485, doi:10.1049/jiee-1.1923.0067 (theiet.org [abgerufen am 19. August 2021]).
W. Cramp, Nora I. Calderwood: The use of single-core sheathed cables for alternating currents. In: Journal of the Institution of Electrical Engineers. Band61, Nr.317, 1. April 1923, ISSN2054-0612, S.477–485, doi:10.1049/jiee-1.1923.0067 (theiet.org [abgerufen am 19. August 2021]).