C.-T. Sah, R. N. Noyce, W. Shockley: Carrier Generation and Recombination in p-n-junctions and p-n-junctions characteristics. In: Proc. IRE. 45, Nr. 9, 1957, S. 1228–1243, doi:10.1109/JRPROC.1957.278528.
worldcat.org
Chih-Tang Sah: Analysis of external circuit traveling-wave tubes. 1956, OCLC652099890 (Ph. D. Thesis, Dept. of Electrical Engineering, Stanford University).