Calderwood, Nora I. (1931). Researches in the theory of matrices (Thesis). University of Edinburgh. EThOSuk.bl.ethos.642319.
doi.org
Cramp, W.; Calderwood, Nora I. (1923). "The use of single-core sheathed cables for alternating currents". Journal of the Institution of Electrical Engineers. 61 (317): 477–485. doi:10.1049/jiee-1.1923.0067.
Cramp, W.; Calderwood, Nora I. (1923). "The calculation of air-space flux". Journal of the Institution of Electrical Engineers. 61 (323): 1061–1071. doi:10.1049/jiee-1.1923.0136.
handle.net
hdl.handle.net
Calderwood, N. R. (1931). Researches in the theory of matrices (Thesis). University of Edinburgh. hdl:1842/29038.